countbuttonpushes.java

来自「The code to demonstrate simple GUI in Ja」· Java 代码 · 共 30 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class CountButtonPushes extends JFrame implements ActionListener {
   private JButton button = new JButton("Press me");
   private JLabel total = new JLabel( "Running total:");
   private JTextField tally  = new JTextField(10);
   private int count    = 0;
   public CountButtonPushes() {
      super("A Container With Components");
      Container cp = getContentPane();
      setSize(500,500);
      cp.setLayout(new FlowLayout());
      cp.add(total);
      cp.add(tally);
      cp.add (button);
      button.addActionListener(this);
      setVisible(true);
      setDefaultCloseOperation(EXIT_ON_CLOSE);
   }
   public void actionPerformed( ActionEvent e ) {
      count++;   // increment counter
      tally.setText(Integer.toString(count));
   }
   public static void main(String args [] ) {
         new CountButtonPushes();
   }
}