menu2.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.event.*;
import java.awt.*;

public class Menu2 extends Frame {
 PopupMenu menu1;
    MenuItem MenuItem1 , MenuItem2 ;
    MenuItem MenuItem3 , MenuItem4 ;
    MenuItem MenuItem5 , MenuItem6 ;
    Menu menu2;
Label label1,label2;
FileDialog dfiledialog1,dfiledialog2;


    public Menu2(String ss) {

        super(ss);

label1=new Label("init");
add(label1);


 dfiledialog1 =new FileDialog(this,"打开文件对话框窗口",FileDialog.LOAD);
dfiledialog2 =new FileDialog(this,"打开文件对话框窗口",FileDialog.SAVE);

              menu1= new PopupMenu();


        MenuItem1=new MenuItem("打开");
           MenuItem1.addActionListener(new ActionListener(){
  public void actionPerformed(ActionEvent e){
  processAction(e);
 }
});
    menu1.add(MenuItem1);

 MenuItem2=new MenuItem("保存");
    MenuItem2.addActionListener(new ActionListener(){
  public void actionPerformed(ActionEvent e){
  processAction(e);}
});
     menu1.add(MenuItem2);

    menu1.addSeparator();

MenuItem3=new MenuItem("打印");
MenuItem3.setEnabled(false);
     menu1.add(MenuItem3);


         menu2= new Menu("工具栏");

    MenuItem5=new CheckboxMenuItem("常用",true);
    menu2.add(MenuItem5);

    MenuItem6=new CheckboxMenuItem("格式",false);
    menu2.add(MenuItem6);

    menu1.add(menu2);
add(menu1);

}

public void processAction(ActionEvent e){

if(e.getSource()== MenuItem1)
               {  dfiledialog1.show();
    String FileName=dfiledialog1.getFile();
       if(FileName==null)
   { label1.setText("你取消了打开文件的选择");}
   else
    {label1.setText("你选择打开的文件名是:"+FileName);
   }
             }
if(e.getSource()== MenuItem2)
               {
                 dfiledialog2.show();
    String FileName=dfiledialog2.getFile();
      if(FileName==null)
   { label1.setText("你取消了保存文件的选择");}
   else
    {label1.setText("你选择保存的文件名是:"+FileName);
   }
                }
}


public Dimension getPreferredSize()
{
  return new Dimension(200,200);
}

    public static void main(String args[]) {
        Menu2 nowFrame=new Menu2("example menu");
         nowFrame.addWindowListener(new WindowAdapter(){
   public void windowClosing(WindowEvent e){
    System.exit(0);
         }
  });

nowFrame.pack();
  nowFrame.show();
    nowFrame.menu1.show(nowFrame,50,50);

    }

    }