border.java

Java课程中所有的可运行程序 全部都是java课程中所涉及到的源码

import java.awt.*;
import java.awt.event.*;


public class border extends Frame{
   Label txt=new Label("null");
   Button bnorth=new Button("North");
   Button bsouth=new Button("South");
   Button beast=new Button("East");
   Button bwest=new Button("West");
    public  border(String ss){
             super(ss);
         this.setLayout(new BorderLayout());
         
         bnorth.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                processAction(e);}
                  }  );
         bsouth.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                processAction(e);}
                  } );
         beast.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                processAction(e);}
                  } );
         bwest.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                processAction(e);}
                  } );
         add("North",bnorth);
         add("South",bsouth);
         add("East",beast);
         add("West",bwest);
         add("Center",txt);
    }

public static void main(String[] args){
  border nowframe=new border("BorderLayout");
  nowframe.addWindowListener(new WindowAdapter(){
   public void windowClosing(WindowEvent e){
    System.exit(0);
         }
  });
  nowframe.pack();
  nowframe.show();
}

public Dimension getPreferredSize()
{
  return new Dimension(300,300);
}
    public void processAction(ActionEvent e){
    Object obj=e.getSource();
    if(obj==bnorth) txt.setText("北");
        if(obj==beast) txt.setText("东");
         if(obj==bwest) txt.setText("西");
         if(obj==bsouth) txt.setText("南");}

     
}