绝对布局

import java.awt.*;

import javax.swing.*;

public class Demo extends JFrame{
    
    
	public Demo() {
    
    
		setBounds(100, 100, 200, 150);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		Container c = getContentPane();
		c.setLayout(null);//将容器的布局设为绝对布局
		JButton b1 = new JButton("按钮1"), b2 = new JButton("按钮2");
		b1.setBounds(10, 30, 80, 30);
		b2.setBounds(60, 70, 100, 20);
		c.add(b1);
		c.add(b2);
		setVisible(true);
	}
	
	public static void main(String[] args) {
    
    
		new Demo();
	}

}