ch9_25.java

来自「java图形用户界面设计 包括如何创建窗体 设计界面 管理布局 绘制图形 」· Java 代码 · 共 44 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ch9_25 extends JFrame implements ActionListener
{
    JLabel jl1;
    public ch9_25()
    {
        setBounds(20,20,500,300);
        getContentPane().setLayout(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);              
    }
    public static void main(String [] args)
    {
        ch9_25 f=new ch9_25();
        f.getContentPane().setLayout(null);
        //有文字
        f.jl1=new JLabel("你好");

        f.jl1.setBounds(20,20,100,50);
        
        JButton jb=new JButton("确定");
        jb.setBounds(150,20,100,50);
        jb.addActionListener(f);
        
       
        f.getContentPane().add(f.jl1);
        f.getContentPane().add(jb);
                
        f.show();
    }
    public void actionPerformed(ActionEvent e)
    {
        jl1.setHorizontalAlignment(JLabel.RIGHT);
        jl1.setVerticalAlignment(JLabel.TOP);  
        
		jl1.setBorder(BorderFactory.createTitledBorder(""));
        
        jl1.setText("hello world");  
        Icon ic=new ImageIcon("icon.jpg");
        jl1.setIcon(ic);    
    }    
}