package second;import java.awt.*;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class BorderLayoutDemo {    private Frame fb;    private Button b1,b2,b3,b4,b5;//声明5个button    //构造函数，实例化button 1 - 5    BorderLayoutDemo(){        b1 = new Button("1");//上北        b2 = new Button("2");//下南        b3 = new Button("3");//左西        b4 = new Button("4");//右东        b5 = new Button("5");//中    }    public static void main(String[] args){        BorderLayoutDemo ly = new BorderLayoutDemo();        ly.show();//显示    }    public void show(){        fb = new Frame("BorderLayout顺序布局");//框架        fb.setSize(500,200);//设置大小        fb.setLayout(new BorderLayout());        fb.add(BorderLayout.NORTH,b1);//将按钮添加到框架中        fb.add(BorderLayout.SOUTH,b2);        fb.add(BorderLayout.WEST,b3);        fb.add(BorderLayout.EAST,b4);        fb.add(BorderLayout.CENTER,b5);        fb.addWindowListener(new WindowAdapter(){//监视关闭按钮，不然TMD根本关不掉            public void windowClosing(WindowEvent evt){                System.exit(0);            }        });        fb.setVisible(true);//最后显示出来    }}

效果如下：