swing9.java

java 初学者学习实例

import javax.swing.*;import java.awt.*;import java.awt.event.*;
public class Swing9 extends JApplet implements ActionListener
{
     JLabel label_1,label_2;JButton button; JTextArea text;
	 public void init()
	 {
	     button = new JButton("确定"); 
		 text = new JTextArea();
		Icon  icon = new ImageIcon("tom.jpg");
		 label_1 = new JLabel("标签 1",icon,JLabel.CENTER);
		 label_2 = new JLabel("标签 2");
		 getContentPane().add(text,BorderLayout.CENTER);
		  getContentPane().add(button,BorderLayout.WEST);
		  getContentPane().add(label_1,BorderLayout.NORTH);
		   getContentPane().add(label_2,BorderLayout.SOUTH);
		   button.addActionListener(this);
	 }
	 public void actionPerformed(ActionEvent e)
	 {
	     if (e.getSource() == button)
		 {
		     label_2.setIcon(label_1.getIcon());text.setText(label_1.getText()+label_2.getText());
		 }
		 button.setIcon(label_1.getIcon());
		 label_1.setHorizontalTextPosition (JLabel.LEFT);
	 }
}