Question

我试图在netbeans中使用java制作薪水计算器。我用它设计了它。当我输入员工注册号员工的姓名时，基本工资和津贴值应显示在表格的相关字段中。但似乎我的代码不起作用。我找不到错误是什么。请告诉我如何解决这个问题并告诉我这段代码有什么问题？我想我做得对。公共类SalaryCal扩展了javax.swing.JFrame {

    jLabel1 = new javax.swing.JLabel();
    jLabel3 = new javax.swing.JLabel();
    jLabel4 = new javax.swing.JLabel();
    jLabel5 = new javax.swing.JLabel();
    jLabel6 = new javax.swing.JLabel();
    jLabel7 = new javax.swing.JLabel();
    jLabel8 = new javax.swing.JLabel();
    jLabel9 = new javax.swing.JLabel();
    jLabel2 = new javax.swing.JLabel();
    NameText = new javax.swing.JTextField();
    MonText = new javax.swing.JTextField();
    OTText = new javax.swing.JTextField();
    SalaryText = new javax.swing.JTextField();
    DaysText = new javax.swing.JTextField();
    AllowText = new javax.swing.JTextField();
    AdvText = new javax.swing.JTextField();
    NetText = new javax.swing.JTextField();
    jButton1 = new javax.swing.JButton();
    jButton2 = new javax.swing.JButton();
    jButton3 = new javax.swing.JButton();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jLabel1.setFont(new java.awt.Font("Tahoma", 1, 24)); // NOI18N
    jLabel1.setForeground(new java.awt.Color(255, 0, 0));
    jLabel1.setText("Salary Calculator");

    jLabel3.setFont(new java.awt.Font("Tahoma", 0, 18)); 
    jLabel3.setText("Employee Name");

    jLabel4.setFont(new java.awt.Font("Tahoma", 0, 18)); 
    jLabel4.setText("Registration Number");

    jLabel5.setFont(new java.awt.Font("Tahoma", 0, 18)); 
    jLabel5.setText("No of OT hours");

    jLabel6.setFont(new java.awt.Font("Tahoma", 0, 18)); 
    jLabel6.setText("No of working hours");

    jLabel7.setText("Basic Salary");

    jLabel8.setFont(new java.awt.Font("Tahoma", 0, 18)); 
    jLabel8.setText("Allowance");

    jLabel9.setFont(new java.awt.Font("Tahoma", 0, 18)); /
    jLabel9.setText("Salary Advance");

    jLabel2.setFont(new java.awt.Font("Tahoma", 0, 18)); 
    jLabel2.setText("Net Salary");

    NameText.setFont(new java.awt.Font("Tahoma", 0, 18)); 
    NameText.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            NameTextActionPerformed(evt);
        }
    });

    MonText.setFont(new java.awt.Font("Tahoma", 0, 18));


    SalaryText.setFont(new java.awt.Font("Tahoma", 0, 18)); 

    DaysText.setFont(new java.awt.Font("Tahoma", 0, 18)); 

    AllowText.setFont(new java.awt.Font("Tahoma", 0, 18)); 

    AdvText.setFont(new java.awt.Font("Tahoma", 0, 18));

    NetText.setFont(new java.awt.Font("Tahoma", 0, 18)); /

    jButton1.setFont(new java.awt.Font("Tahoma", 1, 14)); /
    jButton1.setText("Reset");
    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, 14)); // NOI18N
    jButton2.setText("Calculate");
    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, 14)); // NOI18N
    jButton3.setText("EXIT");
    jButton3.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            jButton3ActionPerformed(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()
            .addGap(59, 59, 59)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jLabel4)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(NameText, javax.swing.GroupLayout.PREFERRED_SIZE, 342, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(layout.createSequentialGroup()
                    .addComponent(jLabel3)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(MonText, javax.swing.GroupLayout.PREFERRED_SIZE, 342, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addComponent(jLabel9)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(AdvText, javax.swing.GroupLayout.PREFERRED_SIZE, 342, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addComponent(jLabel8)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(AllowText, javax.swing.GroupLayout.PREFERRED_SIZE, 342, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addComponent(jLabel7)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(SalaryText, javax.swing.GroupLayout.PREFERRED_SIZE, 342, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addComponent(jLabel6)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 56, Short.MAX_VALUE)
                    .addComponent(DaysText, javax.swing.GroupLayout.PREFERRED_SIZE, 342, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addComponent(jLabel5)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(OTText, javax.swing.GroupLayout.PREFERRED_SIZE, 342, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                    .addComponent(jLabel2)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addGroup(layout.createSequentialGroup()
                            .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 92, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGap(34, 34, 34)
                            .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 107, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addGap(30, 30, 30)
                            .addComponent(jButton3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                        .addComponent(NetText, javax.swing.GroupLayout.PREFERRED_SIZE, 342, javax.swing.GroupLayout.PREFERRED_SIZE))))
            .addGap(40, 40, 40))
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addComponent(jLabel1)
            .addGap(203, 203, 203))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(18, 18, 18)
            .addComponent(jLabel1)
            .addGap(28, 28, 28)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel4)
                .addComponent(NameText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                .addComponent(jLabel3)
                .addComponent(MonText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(24, 24, 24)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel5)
                .addComponent(OTText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                .addComponent(jLabel6)
                .addComponent(DaysText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(36, 36, 36)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel7)
                .addComponent(SalaryText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jLabel8)
                .addComponent(AllowText, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                .addComponent(jLabel9)
                .addComponent(AdvText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel2)
                .addComponent(NetText, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(27, 27, 27)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jButton1)
                .addComponent(jButton2)
                .addComponent(jButton3))
            .addContainerGap(25, Short.MAX_VALUE))
    );

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

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

}                                        

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    System.exit(0);
}                                        

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    NameText.setText("");
    MonText.setText("");
    OTText.setText("");
    SalaryText.setText("");
    DaysText.setText("");
    AllowText.setText("");
    AdvText.setText("");
    NetText.setText("");


}                                        

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         

    String valueForName;                                                                                                         
    valueForName=NameText.getText().toString();

     MonText.setText(valueForName);

            if (valueForName=="002"){
                NameText.setText("Mr.Samuel Silva");
                SalaryText.setText("65000");
                AllowText.setText("14500");
}

Answer 1

如果这是您的所有代码，那么您会遗漏一些事情。您没有声明任何变量类型。例如：

jLabel1 = new javax.swing.JLabel();

应该是：

JLabel jLabel1 = new JLabel();

另一个问题是你的类中的一些方法没有被正确调用。这个功能：

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

需要使用JFrame对象进行调用，而您似乎无法访问该对象。这可以通过以下代码解决，但您可能需要使用不同的方法。

JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

还需要以相同的方式调用getContentPane()和pack()方法。

最后，当你打电话时：

NameText.setText("Mr.Samuel Silva");

您需要确保对象的范围正确。 jButton2ActionPerformed(java.awt.event.ActionEvent evt)无法访问initComponents()中声明的变量。

Answer 2

在第if (valueForName=="002")行，您必须使用equals方法not ==运算符检查equiavanlance。此检查始终返回false

如何在java表单的标签上显示值

2 个答案: