package Layout;

 import java.awt.*;

 import javax.swing.*;

 public class MyBorderLayout extends JFrame{

     private JButton b1 = new JButton("东");

     private JButton b2 = new JButton("南");

     private JButton b3 = new JButton("西");

     private JButton b4 = new JButton("北");

     private JButton b5 = new JButton("中");

 public MyBorderLayout(){

     setTitle("用户界面");

     setSize(500, 500);

     setLocation(100, 100);

     add(b1,BorderLayout.EAST);

     add(b2,BorderLayout.SOUTH);

     add(b3,BorderLayout.WEST);

     add(b4,BorderLayout.NORTH);

     add(b5,BorderLayout.CENTER);

     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

     setVisible(true);

 }

     public static void main(String[] args) {

     MyBorderLayout l = new MyBorderLayout();

     }

 }

 package Layout;

 import java.awt.*;

 import java.util.HashMap;

 import java.util.Map;

 import javax.swing.*;

 public class MyFlowLayout extends JFrame{

     private  Map<String,JButton> map = new HashMap();

     private  JButton b = new JButton();

    public MyFlowLayout(){

        map.put("B1",new JButton("B1"));

        map.put("B2",new JButton("B2"));

        map.put("B3",new JButton("B3"));

        map.put("B4",new JButton("B4"));

        map.put("B5",new JButton("B5"));

        this.setLayout(new FlowLayout());

     //   this.setLayout(new FlowLayout(FlowLayout.LEFT));

     //   this.setLayout(new FlowLayout(FlowLayout.RIGHT));

        this.add(map.get("B1"));

        this.add(map.get("B2"));

        this.add(map.get("B3"));

        this.add(map.get("B4"));

        this.add(map.get("B5"));

        this.setTitle("用户界面");

        this.setSize(500, 400);

        this.setLocation(400, 500);

        this.setVisible(true);

    }

     public static void main(String[] args) {

          MyFlowLayout l = new MyFlowLayout();

     }

 }

 package Layout;

 import java.awt.*;

 import java.util.HashMap;

 import java.util.Map;

 import javax.swing.*;

 public class MyGridLayout extends JFrame {

     private  Map<String,JButton> map = new HashMap();

     public MyGridLayout (){

                map.put("B1",new JButton("B1"));

                map.put("B2",new JButton("B2"));

                map.put("B3",new JButton("B3"));

                map.put("B4",new JButton("B4"));

                map.put("B5",new JButton("B5"));

                map.put("B6",new JButton("B6"));

                map.put("B7",new JButton("B7"));

                map.put("B8",new JButton("B8"));

                map.put("B9",new JButton("B9"));

                this.add(map.get("B1"));

                this.add(map.get("B2"));

                this.add(map.get("B3"));

                this.add(map.get("B4"));

                this.add(map.get("B5"));

                this.add(map.get("B6"));

                this.add(map.get("B7"));

                this.add(map.get("B8"));

                this.add(map.get("B9"));

                this.setTitle("用户界面");

                this.setSize(500, 600);

                this.setLocation(500, 500);

                this.setVisible(true);

               this.setLayout(new GridLayout(3,3,15,15)); 

     }

     public static void main(String[] args) {

     MyGridLayout l = new MyGridLayout();

     }

 }