labelandbuttondemo.java

来自「精通JBuilder2006 源代码 精通JBuilder2006 源代码」· Java 代码 · 共 42 行

package chapter6.component;

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class LabelAndButtonDemo extends JFrame {
    int i = 0, j = 0;
    JLabel jLabel1 = new JLabel("" + i, JLabel.CENTER);
    JLabel jLabel2 = new JLabel("" + j, JLabel.CENTER);
    public LabelAndButtonDemo() {
        Container contentPane = this.getContentPane();
        contentPane.setLayout(new GridLayout(2, 2));
        JButton jButton1 = new JButton("ADD");
        JButton jButton2 = new JButton("ADD");
        jButton1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                i++;
                jLabel1.setText("" + i);
            }
        });
        jButton2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                j++;
                jLabel2.setText("" + j);
            }
        });
        contentPane.add(jLabel1);
        contentPane.add(jLabel2);
        contentPane.add(jButton1);
        contentPane.add(jButton2);
        this.setTitle("LabelAndButtonDemo");
        this.setSize(300, 300);
        this.setLocation(400, 400);
        this.setVisible(true);
    }

    public static void main(String[] args) {
        LabelAndButtonDemo test = new LabelAndButtonDemo();
    }
}