简介

BorderLayout把容器分成五个部分：东南西北中，用add(Component,index)方法可以把组件添加到BorderLayout之中，index的取值有BorderLayout.EAST,BorderLayout.NORTH,BorderLayout.WEST,BorderLayout.SOUTH,BorderLayout.CENTER。

效果

代码

package Test;

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

public class TestFrame extends JFrame{
        public TestFrame(){
            setLayout(new BorderLayout(5,10));

            add(new JButton("East"),BorderLayout.EAST);
            add(new JButton("North"),BorderLayout.NORTH);
            add(new JButton("West"),BorderLayout.WEST);
            add(new JButton("South"),BorderLayout.SOUTH);
            add(new JButton("Center"),BorderLayout.CENTER);

        }

    public static void main(String[] args) {
        TestFrame frame=new TestFrame();
        frame.setTitle("ShowBorderLayout");
        frame.setSize(300,200);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}
public TestFrame(){
            setLayout(new BorderLayout(5,10));

            add(new JButton("East"),BorderLayout.EAST);
            add(new JButton("North"),BorderLayout.NORTH);
            add(new JButton("West"),BorderLayout.WEST);
            add(new JButton("South"),BorderLayout.SOUTH);
        }

    public static void main(String[] args) {
        TestFrame frame=new TestFrame();
        frame.setTitle("ShowBorderLayout");
        frame.setSize(300,200);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}

注意

如果把东区删除，会发现中区会向右延伸占据东区，效果如下：