運用BorderLayout以線框來放置元件

package test.swing.layout;

import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

public class TestBorderLayout extends JFrame {
	
	private JPanel contentPane;

	public static void main(String[] args) {
		TestBorderLayout frame = new TestBorderLayout();
		frame.setVisible(true);
	}
	
	public TestBorderLayout() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 450, 300);   //(左邊界,上邊界,宽度,長度)
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));   //(上,左,下,右)
		setContentPane(contentPane);
		
		//依據東、西、南、北、中的方位來放置components
		contentPane.setLayout(new BorderLayout());	
		
		JButton eastBtn = new JButton("東方");
		contentPane.add(eastBtn, BorderLayout.EAST);
		
		JButton westBtn = new JButton("西方");
		contentPane.add(westBtn, BorderLayout.WEST);
		
		JButton southBtn = new JButton("南方");
		contentPane.add(southBtn, BorderLayout.SOUTH);
		
		JButton northBtn = new JButton("北方");
		contentPane.add(northBtn, BorderLayout.NORTH);	
		
		JButton centerBtn = new JButton("中間");
		contentPane.add(centerBtn, BorderLayout.CENTER);	
		
	}

}

執行結果