标签 JLable 类

标签JLable上可以添加图像，当鼠标停留在标签上时，可以显示一段提示文字。

package first;
import javax.swing.*;

import java.awt.*;
import java.awt.event.*;
class LbTest extends JFrame implements ActionListener
{
	public LbTest(String s) {
		setSize(900,900);
		setVisible(true);
		setTitle(s);
		setLayout(new FlowLayout());
		ImageIcon icon1=new ImageIcon("./image/1.jpg");///图片的路径要写全
		ImageIcon icon2=new ImageIcon("./image/2.jpg");
		ImageIcon icon3=new ImageIcon("./image/3.jpg");
		JButton jbtn=new JButton("我是按钮",icon1);
		jbtn.setRolloverIcon(icon2);///当鼠标停在按钮上时变换图标
		JLabel jlb=new JLabel("我是标签",icon3,SwingConstants.CENTER);
		jlb.setToolTipText("QQ头像");///当鼠标停留在标签上时显示提示文本
		add(jbtn);
		add(jlb);
		jbtn.addActionListener(this);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		validate();
		// TODO Auto-generated constructor stub
	}

	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		JInternalFrame in_Window;///声明内部窗体对象
		in_Window=new JInternalFrame("内部窗体",true,true,true,true);
		in_Window.setSize(250,200);
		in_Window.setVisible(true);
		add(in_Window);
		JTextArea text =new JTextArea(5,15);///创建文本区对象
		in_Window.add(text,BorderLayout.CENTER);
	}
}
public class Test  
{
	public static void main(String[] args) 
	{
	  LbTest winLbTest=new LbTest("有图标的按钮和标签");	 
	}
}