guidemo3.java

java程序设计语言源代码

//Example 3 of Chapter 5

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

public class GUIDemo3 extends JFrame
{
	private JButton b[];
	String names[] = {"北侧","南侧","东侧","西侧","中间"};
	private BorderLayout layout;
	
	public GUIDemo3(String s)
	{
		super(s);
		
		layout = new BorderLayout(5,5);//设定间距为5
		Container container = getContentPane();//获取中间容器
		container.setLayout(layout);//对中间容器设定管理器
		
		b = new JButton[ names.length ];
		
		for(int i = 0; i<names.length; i++)b[i] = new JButton(names[i]);
				
		container.add(b[0], BorderLayout.NORTH);
		container.add(b[1], BorderLayout.SOUTH);
		container.add(b[2], BorderLayout.EAST);
		container.add(b[3], BorderLayout.WEST);
		container.add(b[4], BorderLayout.CENTER);
		
		setSize(300,200);
		setVisible(true);
	}
	
	public static void main(String[] args)
	{
		GUIDemo3 demo = new GUIDemo3("BorderLayout布局管理器演示");
		demo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}