3. GridLayout布局管理器

效果：

package com.lvshitech.gui;

import java.awt.Button;
import java.awt.Container;
import java.awt.GridLayout;

import javax.swing.JApplet;

public class GridLayoutDemo extends JApplet {
	private static final long serialVersionUID = 1L;
	public void init() {
		Container c = getContentPane();
		c.setLayout(new GridLayout(3, 2));
		c.add(new Button("1"));
		c.add(new Button("2"));
		c.add(new Button("3"));
		c.add(new Button("4"));
		c.add(new Button("5"));
		c.add(new Button("6"));
	}
}