gridlayoutdemo.java

java课程的资料以及实验的代码

import javax.swing.*;
import java.awt.*;


public class GridLayoutDemo extends JFrame 
{
	JButton b1,b2,b3,b4;
	GridLayout g1;//声明一个网格布局管理器
	
	public GridLayoutDemo()
	{
		//g1=new GridLayout(2,2);//指定行数列数为2行2列
		g1=new GridLayout(2,2,20,20);
		
		JPanel p1=new JPanel();
		
		p1.setLayout(g1);//将面板容器的布局设置为g1(2行2列的网格布局)
		b1=new JButton("Button 1");
		b2=new JButton("Button 2");
		b3=new JButton("Button 3");
		b4=new JButton("Button 4");
		
		p1.add(b1);
		p1.add(b2);
		p1.add(b3);
		p1.add(b4);
		
		p1.setBackground(Color.blue);
	
		this.getContentPane().add(p1);
		setSize(200,200);
		setVisible(true);
	}
	public static void main(String []args)
	{
		new GridLayoutDemo();
	}
}