testmenu1.java

一些简单的java程序。老师很认真

package com.test;
import javax.swing.*;

import java.awt.BorderLayout;
import java.awt.Dialog;
import java.awt.FileDialog;
import java.awt.Label;
import java.awt.event.*;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.awt.*;
import com.resource.MyMouseEvent;
public class TestMenu1 extends JFrame implements ActionListener,ItemListener,MouseListener{
	JMenuBar mb=new JMenuBar();
	JMenu file=new JMenu("文件"); 
	JMenu edit=new JMenu("编辑"); 
	JMenu font=new JMenu("字体");
	JMenuItem open=new JMenuItem("打开");
	JMenuItem save=new JMenuItem("保存");
	JMenuItem exit=new JMenuItem("退出");
	JMenuItem copy=new JMenuItem("复制"); 
	JMenuItem paste=new JMenuItem("粘贴");
	JCheckBoxMenuItem bold=new JCheckBoxMenuItem("加粗"); 
	JCheckBoxMenuItem ita=new JCheckBoxMenuItem("倾斜");
	JTextArea ta=new JTextArea(30,20); 
	JButton openDialog=new JButton("openDialog");
	JButton hideDialog=new JButton("hideDialog");
	JMenuItem copy1=new JMenuItem("复制");
	JMenuItem paste1=new JMenuItem("粘贴");
	JPopupMenu pm=new JPopupMenu();
	String tmp=new String();
	JDialog dl=new JDialog(this,"测试对话框");;
	TestMenu1() 
	{ 
		this.setSize(1200,800);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		open.addActionListener(this);
		save.addActionListener(this);
		exit.addActionListener(this);
		copy.addActionListener(this);
		paste.addActionListener(this);
		bold.addItemListener(this);
		openDialog.addActionListener(this);
		hideDialog.addActionListener(this);
		file.add(open);
		file.add(save);
		file.add(exit);
		edit.add(copy);
		edit.add(paste);
		edit.add(font);
		font.add(bold);
		mb.add(file);
		mb.add(edit);
		this.add(mb,BorderLayout.NORTH);
		ta.setFont(new Font("SansSerif",Font.PLAIN,14));
    	ta.setLineWrap(true);
    	ta.setWrapStyleWord(true);
    	copy1.addActionListener(this);
    	paste1.addActionListener(this);
    	pm.add(copy1);
    	pm.add(paste1);
    	ta.add(pm);
    	ta.addMouseListener(this); 
    	this.add(ta,BorderLayout.CENTER);
		JPanel p=new JPanel();
		p.add(openDialog);
		p.add(hideDialog);
		this.add(p,BorderLayout.SOUTH);
		dl.add(new JLabel("这是一个对话框"),BorderLayout.NORTH); 
		dl.add(new JButton("ok"),BorderLayout.WEST);
		dl.add(new JButton("cancel"),BorderLayout.EAST);
		dl.setSize(100,60);
		dl.setModal(false);
		this.pack();
		this.setVisible(true);
    }
	public void actionPerformed(ActionEvent e){
		if (e.getSource()==open)
		{
			try{ 
				FileDialog fd=new FileDialog(this,"打开",FileDialog.LOAD); 
				fd.setVisible(true); 
				BufferedReader in =new BufferedReader(new FileReader(fd.getDirectory()+fd.getFile()));
			    String s,s2= new String();
			    while((s=in.readLine())!=null)
				  {
			    	s2=s+"\r\n";
			    	ta.append(s2);
				  }
			    in.close();
				}catch(IOException ex){}
		}
		if (e.getActionCommand()=="复制")
		    this.tmp=ta.getSelectedText();
		if (e.getActionCommand()=="粘贴")
			ta.insert(this.tmp,ta.getCaretPosition());
		if(e.getSource()==openDialog)
		{
			dl.show(true);
		}
		if(e.getSource()==hideDialog)
		{
			dl.hide();
		}
	}
	public void itemStateChanged(ItemEvent e) {
		if (e.getSource()==bold)
		{
			if(bold.isSelected())
			  ta.setFont(new Font("Arial",Font.BOLD,24));
			else
				ta.setFont(new Font("SansSerif",Font.PLAIN,14));
		}
	}
	public void mouseClicked(MouseEvent e) { }
    public void mouseEntered(MouseEvent e) { }
    public void mouseExited(MouseEvent e) {  }
    public void mousePressed(MouseEvent e) {
	   if (e.getButton() == MouseEvent.BUTTON3) 
	     pm.show(this,e.getX(),e.getY());
	  }
	public void mouseReleased(MouseEvent e){ }
	public static void main(String[] args){
		TestMenu1 t=new TestMenu1();
	}
}