testframe.java

该文件在eclipse环境上运行

package test.gui;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;

import javax.swing.JButton;
import javax.swing.JFrame;

public class TestFrame {

	public static void main(String[] args) {
		JFrame frame = new JFrame("hello");
		frame.setSize(500,200);
		frame.setDefaultCloseOperation(
				JFrame.EXIT_ON_CLOSE);
//		frame.setLayout(new GridLayout(3,2));
		frame.setLayout(new FlowLayout());
		JButton button1 = new JButton("west");
		JButton button2 = new JButton("east");
		JButton button3 = new JButton("sourth");
		JButton button4 = new JButton("north");
		JButton button5 = new JButton("center");
		frame.add(button1,BorderLayout.WEST);
		frame.add(button2,BorderLayout.EAST);
		frame.add(button3,BorderLayout.SOUTH);
		frame.add(button4,BorderLayout.NORTH);
		frame.add(button5,BorderLayout.CENTER);
		System.out.println(frame.getLayout());
		frame.setVisible(true);
	}

}