Java SE (1)之 JFrame 组件 GridLayout布局

package com.sunzhiyan;
import java.awt.*;

import javax.swing.*;
public class Demo_2 extends JFrame{

	/**
	 * @param args
	 */
	JButton jb[] = new  JButton[10];
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Demo_2 demo = new Demo_2();

	}
    public Demo_2()
    {
    	for(int i=0;i<9;i++){
    		 jb[i] = new  JButton("123");
    		 this.add(jb[i]);
    	}
       //前两个参数是设置网格的横纵，后面两个是设置之间的间距
    	this.setLayout(new GridLayout(3,3,50,50));
       //设置一个窗体的基本方法
    	this.setTitle("jisuanqi");
    	this.setSize(400,400);
    	this.setLocation(200,200);
    	this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    	this.setVisible(true);

    }
}