Question

我正在做一个项目，我需要4个按钮，每个按钮将执行某种不同的数学函数。我把所有的函数都写在与程序分开的程序中，并带有按钮。

我将使用我在NetBeans中制作的示例程序，而不是将整个代码发布到我的实际项目中。

public class NewJPanel extends javax.swing.JPanel {

    /**
     * Creates new form NewJPanel
     */
    public NewJPanel() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jTextField1 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        jButton3 = new javax.swing.JButton();

        jTextField1.setText("jTextField1");

        jButton1.setText("jButton1");

        jButton2.setText("jButton2");

        jButton3.setText("jButton3");
        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(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(27, 27, 27)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jButton1)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton2)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(jButton3))
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap(79, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(29, 29, 29)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 149, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton1)
                    .addComponent(jButton2)
                    .addComponent(jButton3))
                .addGap(78, 78, 78))
        );
    }// </editor-fold>                        

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {                                         
      // TODO add your handling code here:
    }                                        


    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JButton jButton3;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration                   
}

这就是带按钮的程序。现在，在按下其中一个JButtons后，如何执行一个名为Celsius的程序？

Answer 1

你不得以启动其他程序的程序为由，而是使用其他类的类。

因此，假设您的Celsius程序具有Celsius类，其方法为

int convertToFahrenheit(int celsiusDegrees)

您的程序将确保在其类路径中包含Celsius程序的jar文件，其中包含Celsius类，并且只需在单击按钮时使用

Celsius celsius = new Celsius();
int fahrenheit = celsius.convertToFehrenheit(someCelsiusDegrees);

因此，简而言之，摄氏程序将成为您的新Swing程序使用的库。

Answer 2

import java.io.*;

public class CallHelloPgm
{
   public static void main(String args[])
   {
      Process theProcess = null;
      BufferedReader inStream = null;



      // call the Hello class
      try
      {
          theProcess = Runtime.getRuntime().exec("java someProgram"); // Your magic line
      }
      catch(IOException e)
      {
         System.err.println("Error on exec() method");
         e.printStackTrace();  
      }

      // read from the called program's standard output stream
      try
      {
         inStream = new BufferedReader(
                                new InputStreamReader( theProcess.getInputStream() ));  
         System.out.println(inStream.readLine());
      }
      catch(IOException e)
      {
         System.err.println("Error on inStream.readLine()");
         e.printStackTrace();  
      }


       } // end method

    } // end class

在我按下我制作的其他程序中的按钮后，如何制作已创建的程序？

2 个答案: