在java计算器中回答按钮帮助

时间：2015-01-24 13:35:52

标签： java calculator

以下是我正在尝试处理的代码，我已经使每个按钮在计算器中工作，但不知道=按钮代码。请帮忙。

案例“+”在文本字段中显示“结果”，而其他案例则给我例外。 

package calculator;

public class Calculator_JFrame extends javax.swing.JFrame {

double firstnum;
double secondnum;
double result;
String operation;


public Calculator_JFrame() {
    initComponents();
}

@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    txtDisplay = new javax.swing.JTextField();
    jButton1 = new javax.swing.JButton();
    jButton2 = new javax.swing.JButton();
    jButton3 = new javax.swing.JButton();
    jButton4 = new javax.swing.JButton();
    jButton5 = new javax.swing.JButton();
    jButton6 = new javax.swing.JButton();
    jButton7 = new javax.swing.JButton();
    jButton8 = new javax.swing.JButton();
    jButton9 = new javax.swing.JButton();
    jButton10 = new javax.swing.JButton();
    jButton11 = new javax.swing.JButton();
    jButton12 = new javax.swing.JButton();
    jButton13 = new javax.swing.JButton();
    jButton14 = new javax.swing.JButton();
    jButton15 = new javax.swing.JButton();
    jButton16 = new javax.swing.JButton();
    jButton17 = new javax.swing.JButton();
    jButton18 = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    txtDisplay.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    txtDisplay.setHorizontalAlignment(javax.swing.JTextField.RIGHT);

    jButton1.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton1.setText("1");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton1ActionPerformed(evt);
        }
    });

    jButton2.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton2.setText("2");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton2ActionPerformed(evt);
        }
    });

    jButton3.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton3.setText("3");
    jButton3.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton3ActionPerformed(evt);
        }
    });

    jButton4.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton4.setText("+");
    jButton4.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton4ActionPerformed(evt);
        }
    });

    jButton5.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton5.setText("4");
    jButton5.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton5ActionPerformed(evt);
        }
    });

    jButton6.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton6.setText("5");
    jButton6.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton6ActionPerformed(evt);
        }
    });

    jButton7.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton7.setText("6");
    jButton7.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton7ActionPerformed(evt);
        }
    });

    jButton8.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton8.setText("-");
    jButton8.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton8ActionPerformed(evt);
        }
    });

    jButton9.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton9.setText("7");
    jButton9.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton9ActionPerformed(evt);
        }
    });

    jButton10.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton10.setText("8");
    jButton10.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton10ActionPerformed(evt);
        }
    });

    jButton11.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton11.setText("9");
    jButton11.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton11ActionPerformed(evt);
        }
    });

    jButton12.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton12.setText("*");
    jButton12.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton12ActionPerformed(evt);
        }
    });

    jButton13.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton13.setText("0");
    jButton13.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton13ActionPerformed(evt);
        }
    });

    jButton14.setFont(new java.awt.Font("Tahoma", 1, 12)); // NOI18N
    jButton14.setText("00");
    jButton14.setMargin(new java.awt.Insets(0, 0, 0, 0));
    jButton14.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton14ActionPerformed(evt);
        }
    });

    jButton15.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton15.setText(".");
    jButton15.setToolTipText("");
    jButton15.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton15ActionPerformed(evt);
        }
    });

    jButton16.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton16.setText("/");
    jButton16.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton16ActionPerformed(evt);
        }
    });

    jButton17.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton17.setText("C");
    jButton17.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton17ActionPerformed(evt);
        }
    });

    jButton18.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton18.setText("=");
    jButton18.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton18ActionPerformed(evt);
        }
    });

 javax.swing.GroupLayout layout = new                 javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(txtDisplay)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton8, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jButton9, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton10, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton11, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton12, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jButton13, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton14, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton15)
                    .addGap(3, 3, 3)
                    .addComponent(jButton16, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton4)
                        .addGap(0, 0, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jButton17, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton18, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
            .addContainerGap())
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(txtDisplay, javax.swing.GroupLayout.PREFERRED_SIZE, 41, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton4, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton8, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton9, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton10, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton11,    javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton12, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton13, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton14, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton15, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton16, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton17, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton18, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addContainerGap())
    );

    pack();
}// </editor-fold>                        

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton1.getText();
    txtDisplay.setText(input);
}                                        

private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {                                         
   firstnum=Double.parseDouble(txtDisplay.getText());
   txtDisplay.setText("");
   operation="+";
}                                        

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton2.getText();
    txtDisplay.setText(input);
}                                        

private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton5.getText();
    txtDisplay.setText(input);
}                                        

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton3.getText();
    txtDisplay.setText(input);
}                                        

private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton6.getText();
    txtDisplay.setText(input);
}                                        

private void jButton9ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton9.getText();
    txtDisplay.setText(input);
}                                        

private void jButton10ActionPerformed(java.awt.event.ActionEvent evt) {                                          
   String input;
    input=txtDisplay.getText()+jButton10.getText();
    txtDisplay.setText(input);
}                                         

private void jButton11ActionPerformed(java.awt.event.ActionEvent evt) {                                          
    String input;
    input=txtDisplay.getText()+jButton11.getText();
    txtDisplay.setText(input);
}                                         

private void jButton13ActionPerformed(java.awt.event.ActionEvent evt) {                                          
    String input;
    input=txtDisplay.getText()+jButton13.getText();
    txtDisplay.setText(input);
}                                         

private void jButton14ActionPerformed(java.awt.event.ActionEvent evt) {                                          
    String input;
    input=txtDisplay.getText()+jButton14.getText();
    txtDisplay.setText(input);
}                                         

private void jButton17ActionPerformed(java.awt.event.ActionEvent evt) {                                          
    txtDisplay.setText("");
}                                         

private void jButton18ActionPerformed(java.awt.event.ActionEvent evt) {                                          
    String ans;
    switch(operation){
        case "+":
           result=firstnum+secondnum;
           ans=String.valueOf(result);
           txtDisplay.setText(ans);
           break;

        case "-":
           result=firstnum-secondnum;
           ans=String.format("%.0f", result);
           txtDisplay.setText(ans);
           break;

        case "*":
           result=firstnum*secondnum;
           ans=String.format("%.0f", result);
           txtDisplay.setText(ans);
           break;

        case "/":
           result=firstnum/secondnum;
           ans=String.format("%.0f", result);
           txtDisplay.setText(ans);
           break;    


    }
}                                         

private void jButton15ActionPerformed(java.awt.event.ActionEvent evt) {                                          

    String input;
    input=txtDisplay.getText()+jButton15.getText();
    txtDisplay.setText(input);
}                                         

private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton7.getText();
    txtDisplay.setText(input);
}                                        

private void jButton8ActionPerformed(java.awt.event.ActionEvent evt) {                                         
   firstnum=Double.parseDouble(txtDisplay.getText());
   txtDisplay.setText("");
   operation="-";
}                                        

private void jButton12ActionPerformed(java.awt.event.ActionEvent evt) {                                          
   firstnum=Double.parseDouble(txtDisplay.getText());
   txtDisplay.setText("");
   operation="*";
}                                         

private void jButton16ActionPerformed(java.awt.event.ActionEvent evt) {                                          
   firstnum=Double.parseDouble(txtDisplay.getText());
   txtDisplay.setText("");
   operation="/";
}                                         

/**
 * @param args the command line arguments
 */
public static void main(String args[]) {
    /* Set the Nimbus look and feel */
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info :  javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {                         java.util.logging.Logger.getLogger(Calculator_JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
              java.util.logging.Logger.getLogger(Calculator_JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
          java.util.logging.Logger.getLogger(Calculator_JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
             java.util.logging.Logger.getLogger(Calculator_JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new Calculator_JFrame().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton10;
private javax.swing.JButton jButton11;
private javax.swing.JButton jButton12;
private javax.swing.JButton jButton13;
private javax.swing.JButton jButton14;
private javax.swing.JButton jButton15;
private javax.swing.JButton jButton16;
private javax.swing.JButton jButton17;
private javax.swing.JButton jButton18;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JButton jButton4;
private javax.swing.JButton jButton5;
private javax.swing.JButton jButton6;
private javax.swing.JButton jButton7;
private javax.swing.JButton jButton8;
private javax.swing.JButton jButton9;
private javax.swing.JTextField txtDisplay;
// End of variables declaration

}

5 个答案:

答案 0 :(得分：0)

在键入操作符号时，您已经在输入中输入了两个操作数; 并且因为你正在进行基本操作（二进制操作（只接受两个参数）），那么你的工作没问题，你不需要“=”操作，因为操作的形式如下：

op(arg1,arg2)

但是如果你想要评估可变参数操作（那些接受任意数量的变量），那么你需要在实践中使用“=”符号。

最后，那些异常呢？你需要为我们提供完整的堆栈跟踪，也许它是关于格式化数字的字符串，检查“％.of”或许它需要是“％。0f”。

答案 1 :(得分：0)

您需要使用String.valueOf方法，否则会出现运行时错误。

  result= firstnum-secondnum;
  ans=String.valueOf(result);
  System.out.println(ans);

break;

这是如何运作的：See Live Demo

答案 2 :(得分：0)

= 操作类型应该只是Identity操作，即它返回与参数相同的值：

private void jButton18ActionPerformed(java.awt.event.ActionEvent evt) {                                          
  String ans;
  switch(operation){
    //...
    case "=":
      //Do nothing when the = sign is pressed as the result would remain the same
      txtDisplay.setText((result != 0) ? 
          Double.toString(result) : 
          Integer.toString(0));
      break;  
  }
}

根据主要问题进行了编辑

您无法在switch文字上绝对使用String语句。它只能用于字节，字符或枚举类型。

在设计基于操作的计算器时，我强烈建议使用标有Enum的{​​{1}}类型来定义计算方法的抽象方法，并且具有不断的特定实现：

Operation

请注意，上述Enum类型可让您获得灵活性，您可以根据需要添加尽可能多的操作，而不会损害其他软件组件，您可以将其用作public enum Operation { ADD { @Override double apply(double argOne, double argTwo) { return argOne + argTwo; } }, SUBSTRUCT { @Override double apply(double argOne, double argTwo) { return argOne - argTwo; } }, DEVIDE { @Override double apply(double argOne, double argTwo) { return argOne / argTwo; } }, MULTIPLY { @Override double apply(double argOne, double argTwo) { return argOne * argTwo; } }; abstract double apply(double argOne, double argTwo); } 标签：

switch

注意： Here您可以找到计算器的全功能工作示例。

答案 3 :(得分：0)

我看到你创造了很多按钮。实际上你可以简单地创建一个按钮数组，并根据数组索引设置按钮的文本。

当用户按下按钮时，只需使用 getText（）方法获取按钮＆＃39;值。

同样适用于数学运算符（+， - ，*，/）。

使用 3行代码创建 10个按钮。

JButton[] button = new JButton[10];
for(int x=0; x<10; x++)
    button = new JButton(Integer.toString(x));  //create buttons 0-9

在actionListener： 

int valuePressed = Integer.parseInt(button.getText());

通过这些，您的整个计划将优雅地运作。

答案 4 :(得分：0)

感谢大家的帮助。我终于成功了。 Yahoooo。谢谢你的建议。 

package calculator;

public class Calculator_JFrame extends javax.swing.JFrame {

  float firstnum;
 float secondnum;
 float result;
 String operation;


public Calculator_JFrame() {
    initComponents();
}

@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">                          
private void initComponents() {

    txtDisplay = new javax.swing.JTextField();
    jButton1 = new javax.swing.JButton();
    jButton2 = new javax.swing.JButton();
    jButton3 = new javax.swing.JButton();
    jButton4 = new javax.swing.JButton();
    jButton5 = new javax.swing.JButton();
    jButton6 = new javax.swing.JButton();
    jButton7 = new javax.swing.JButton();
    jButton8 = new javax.swing.JButton();
    jButton9 = new javax.swing.JButton();
    jButton10 = new javax.swing.JButton();
    jButton11 = new javax.swing.JButton();
    jButton12 = new javax.swing.JButton();
    jButton13 = new javax.swing.JButton();
    jButton14 = new javax.swing.JButton();
    jButton15 = new javax.swing.JButton();
    jButton16 = new javax.swing.JButton();
    jButton17 = new javax.swing.JButton();
    jButton18 = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
    setResizable(false);

    txtDisplay.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    txtDisplay.setHorizontalAlignment(javax.swing.JTextField.RIGHT);

    jButton1.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton1.setText("1");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton1ActionPerformed(evt);
        }
    });

    jButton2.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton2.setText("2");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton2ActionPerformed(evt);
        }
    });

    jButton3.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton3.setText("3");
    jButton3.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton3ActionPerformed(evt);
        }
    });

    jButton4.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton4.setText("+");
    jButton4.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton4ActionPerformed(evt);
        }
    });

    jButton5.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton5.setText("4");
    jButton5.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton5ActionPerformed(evt);
        }
    });

    jButton6.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton6.setText("5");
    jButton6.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton6ActionPerformed(evt);
        }
    });

    jButton7.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton7.setText("6");
    jButton7.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton7ActionPerformed(evt);
        }
    });

    jButton8.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton8.setText("-");
    jButton8.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton8ActionPerformed(evt);
        }
    });

    jButton9.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton9.setText("7");
    jButton9.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton9ActionPerformed(evt);
        }
    });

    jButton10.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton10.setText("8");
    jButton10.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton10ActionPerformed(evt);
        }
    });

    jButton11.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton11.setText("9");
    jButton11.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton11ActionPerformed(evt);
        }
    });

    jButton12.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton12.setText("*");
    jButton12.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton12ActionPerformed(evt);
        }
    });

    jButton13.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton13.setText("0");
    jButton13.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton13ActionPerformed(evt);
        }
    });

    jButton14.setFont(new java.awt.Font("Tahoma", 1, 12)); // NOI18N
    jButton14.setText("00");
    jButton14.setMargin(new java.awt.Insets(0, 0, 0, 0));
    jButton14.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton14ActionPerformed(evt);
        }
    });

    jButton15.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton15.setText(".");
    jButton15.setToolTipText("");
    jButton15.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton15ActionPerformed(evt);
        }
    });

    jButton16.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton16.setText("/");
    jButton16.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton16ActionPerformed(evt);
        }
    });

    jButton17.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton17.setText("C");
    jButton17.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton17ActionPerformed(evt);
        }
    });

    jButton18.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
    jButton18.setText("=");
    jButton18.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton18ActionPerformed(evt);
        }
    });

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap()
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(txtDisplay)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton8, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jButton9, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton10, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton11, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton12, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jButton13, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton14, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                    .addComponent(jButton15)
                    .addGap(3, 3, 3)
                    .addComponent(jButton16, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton4)
                        .addGap(0, 0, Short.MAX_VALUE))
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jButton17, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton18, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))))
            .addContainerGap())
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addContainerGap()
            .addComponent(txtDisplay, javax.swing.GroupLayout.PREFERRED_SIZE, 41, javax.swing.GroupLayout.PREFERRED_SIZE)
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton3, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton4, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton5, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton6, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton7, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton8, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton9, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton10, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton11, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton12, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton13, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton14, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton15, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton16, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton17, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addComponent(jButton18, javax.swing.GroupLayout.PREFERRED_SIZE, 34, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addContainerGap())
    );

    pack();
}// </editor-fold>                        

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton1.getText();
    txtDisplay.setText(input);
}                                        

private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {                                         
  try{        
   firstnum=Float.parseFloat(txtDisplay.getText());
   txtDisplay.setText("");
   operation="+";
  }
  catch (Exception e){
    txtDisplay.setText("Invalid Number");
  }
}                                        

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton2.getText();
    txtDisplay.setText(input);
}                                        

private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton5.getText();
    txtDisplay.setText(input);
}                                        

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton3.getText();
    txtDisplay.setText(input);
}                                        

private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton6.getText();
    txtDisplay.setText(input);
}                                        

private void jButton9ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton9.getText();
    txtDisplay.setText(input);
}                                        

private void jButton10ActionPerformed(java.awt.event.ActionEvent evt) {                                          
   String input;
    input=txtDisplay.getText()+jButton10.getText();
    txtDisplay.setText(input);
}                                         

private void jButton11ActionPerformed(java.awt.event.ActionEvent evt) {                                          
    String input;
    input=txtDisplay.getText()+jButton11.getText();
    txtDisplay.setText(input);
}                                         

private void jButton13ActionPerformed(java.awt.event.ActionEvent evt) {                                          
    String input;
    input=txtDisplay.getText()+jButton13.getText();
    txtDisplay.setText(input);
}                                         

private void jButton14ActionPerformed(java.awt.event.ActionEvent evt) {                                          
    String input;
    input=txtDisplay.getText()+jButton14.getText();
    txtDisplay.setText(input);
}                                         

private void jButton17ActionPerformed(java.awt.event.ActionEvent evt) {                                          
    txtDisplay.setText("");
}                                         

private void jButton18ActionPerformed(java.awt.event.ActionEvent evt) {                                          

    secondnum=Float.parseFloat(txtDisplay.getText());       
    String ans;
     try{

    if(operation=="+"){
           result=firstnum+secondnum;
           ans=String.valueOf(result);
           txtDisplay.setText(ans);
    }else if(operation=="-"){

          result=firstnum-secondnum;
           ans=String.valueOf(result);
           txtDisplay.setText(ans);

    }else if (operation.equals("*")){
           result=firstnum*secondnum;
           ans=String.valueOf(result);
           txtDisplay.setText(ans);
    }else if(operation.equals("/")){
          result=firstnum/secondnum;
           ans=String.valueOf(result);
           txtDisplay.setText(ans);
    }
     }
     catch(Exception e){
      txtDisplay.setText("Enter Valid Number");
     }
}                                         

private void jButton15ActionPerformed(java.awt.event.ActionEvent evt) {                                          

    String input;
    input=txtDisplay.getText()+jButton15.getText();
    txtDisplay.setText(input);
}                                         

private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    String input;
    input=txtDisplay.getText()+jButton7.getText();
    txtDisplay.setText(input);
}                                        

private void jButton8ActionPerformed(java.awt.event.ActionEvent evt) {                                         
  try{        
   firstnum=Float.parseFloat(txtDisplay.getText());
   txtDisplay.setText("");
   operation="-";
  }
  catch (Exception e){
    txtDisplay.setText("Invalid Number");
  }
}                                        

private void jButton12ActionPerformed(java.awt.event.ActionEvent evt) {                                          
  try{        
   firstnum=Float.parseFloat(txtDisplay.getText());
   txtDisplay.setText("");
   operation="*";
  }
  catch (Exception e){
    txtDisplay.setText("Invalid Number");
  }
}                                         

private void jButton16ActionPerformed(java.awt.event.ActionEvent evt) {                                          
  try{        
   firstnum=Float.parseFloat(txtDisplay.getText());
   txtDisplay.setText("");
   operation="/";
  }
  catch (Exception e){
    txtDisplay.setText("Invalid Number");
  }
}                                         

/**
 * @param args the command line arguments
 */
public static void main(String args[]) {
    /* Set the Nimbus look and feel */
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
    /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
     * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
     */
    try {
        for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                javax.swing.UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (ClassNotFoundException ex) {
        java.util.logging.Logger.getLogger(Calculator_JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(Calculator_JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(Calculator_JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(Calculator_JFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new Calculator_JFrame().setVisible(true);
        }
    });
}

// Variables declaration - do not modify                     
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton10;
private javax.swing.JButton jButton11;
private javax.swing.JButton jButton12;
private javax.swing.JButton jButton13;
private javax.swing.JButton jButton14;
private javax.swing.JButton jButton15;
private javax.swing.JButton jButton16;
private javax.swing.JButton jButton17;
private javax.swing.JButton jButton18;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JButton jButton4;
private javax.swing.JButton jButton5;
private javax.swing.JButton jButton6;
private javax.swing.JButton jButton7;
private javax.swing.JButton jButton8;
private javax.swing.JButton jButton9;
private javax.swing.JTextField txtDisplay;
// End of variables declaration

}

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