ex919.txt

JAVA 基础例题包含了JAVA常见的问题和常见的习题

import java.awt.*;
import javax.swing.*;
public class NullLayout extends JFrame
{	JButton b1=new JButton("按钮1");
   	JButton b2=new JButton("按钮2");
   	JButton b3=new JButton("按钮3");
  	JLabel lb=new JLabel("看我们的摆放位置，很随意！！");
   	public NullLayout()
	{	super("nullLayout Demo");
		Container c=getContentPane();
		c.setLayout(null);
   		c.add(lb);
		lb.setBounds(200,60,200,30);
   		c.add(b1);
		b1.setBounds(20,30,50,30);
    		c.add(b2);
  	  	b2.setBounds(100,70,50,30);
  	  	c.add(b3);
   	 	b3.setBounds(150,100,60,50);
   		show();
	}
   	public static void main(String args[])
   	{	new NullLayout();
   	}
}