layouttest.java

来自「这是清华大学编写的JAVA教材中所有题目的源代码！」· Java 代码 · 共 57 行

import java.awt.*;
import java.awt.event.*;

public class LayoutTest implements ActionListener
{
	Frame f=new Frame("正在测试布局！");
	LayoutManager layout;
	
	public LayoutTest()
	{
		Button btnWest=new Button("西");
		Button btnEast=new Button("东");
		Button btnNorth=new Button("北");
		Button btnSouth=new Button("南");
		Button btnCenter=new Button("中");
		
		btnWest.addActionListener(this);
		btnEast.addActionListener(this);
		btnNorth.addActionListener(this);
		btnSouth.addActionListener(this);
		btnCenter.addActionListener(this);
		
		f.add(btnEast,BorderLayout.EAST);
		f.add(btnWest,BorderLayout.WEST);
		f.add(btnNorth,BorderLayout.NORTH);
		f.add(btnSouth,BorderLayout.SOUTH);
		f.add(btnCenter,BorderLayout.CENTER);
		
		/*
		f.setLayout(new FlowLayout());
		f.add(btnEast);
		f.add(btnWest);
		f.add(btnNorth);
		f.add(btnSouth);
		f.add(btnCenter);
		*/
		layout=f.getLayout();
		f.setSize(300,200);
		f.setVisible(true);
	}

	public void actionPerformed(ActionEvent e)
	{
		Button b=(Button)e.getSource();
		b.setVisible(false);
		//方法1
		//layout.layoutContainer(f);
		
		//方法2
		//f.validate();
	}

	public static void main(String args[])
	{
		new LayoutTest();
	}
}