buttonlabeldemo.java

来自「java课件 java课件 java课件 java课件」· Java 代码 · 共 26 行

//<applet code="ButtonLabelDemo.class" height="200" width="300">
//</applet>
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ButtonLabelDemo extends JApplet{
    JLabel label=new JLabel("It's a label");
    JButton button=new JButton("It's a button");	
    public void init(){
        Container cp=getContentPane();
        cp.setBackground(Color.CYAN);
        cp.setLayout(new FlowLayout());
        cp.add(label);
        cp.add(button);
        button.addActionListener(new ActionListener(){
           public void actionPerformed(ActionEvent e){
             String sb=button.getText();
             String sl=label.getText();
             label.setText(sb);
             button.setText(sl);
           } 
         }
        );
   }
}