import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import java.awt.*;
import java.io.*;
public class D extends Thread implements ActionListener
{
	JFrame frame;
	JMenuBar menuBar;
	JMenu menu1,menu2,menu3;
	JMenuItem fm1,fm2,fm3;
	JMenuItem bm1,bm2,bm3;
	JLabel label;
	JLabel labelFile = new JLabel();
	JTextArea text;
	JMenuItem em;
	JPanel panelCenter;
	JPanel panelButtom;
	Thread thread ;
	File selectFilename;
	FileInputStream fis;
	public static void main(String[] args) 
	{
		JFrame.setDefaultLookAndFeelDecorated(true);
		new D("新建窗體");
	}

	public D()
	{}

	public D(String title)
	{
		frame = new JFrame();
		frame.setTitle(title);
		frame.setSize(520,420);
		frame.setLocation(200,100);
		makeMenu();
		makeLayout();
		initFrameEvent();
		frame.setJMenuBar(menuBar);
		fm1.addActionListener(this);
		fm2.addActionListener(this);
		fm3.addActionListener(this);
		bm1.addActionListener(this);
		bm2.addActionListener(this);
		em.addActionListener(this);
		frame.setVisible(true);
		thread= new Thread(this);
		thread.start();
	}

	public void makeMenu()
	{
		menuBar = new JMenuBar();
		menu1 = new JMenu(" 文件 ");
		fm1 = new JMenuItem("打開文件");
		fm2 = new JMenuItem("保存文件");
		fm3 = new JMenuItem("退出程序");
		menu1.add(fm1);
		menu1.add(fm2);
		menu1.add(fm3);

		menu2 = new JMenu(" 編輯 ");
		bm1 = new JMenuItem("全選");
		bm2 = new JMenuItem("清空");
		menu2.add(bm1);
		menu2.add(bm2);

		menu3 = new JMenu(" 退出 ");
		em = new JMenuItem("退出程序");
		menu3.add(em);

		menuBar.add(menu1);
		menuBar.add(menu2);
		menuBar.add(menu3);
	}
	
	public void makeLayout()
	{
		panelCenter = new JPanel();
		panelCenter.setLayout(new BorderLayout());
		panelButtom = new JPanel();
		panelButtom.setLayout(new GridLayout(1,2));
		
		text = new JTextArea();
		label = new JLabel("    當(dāng)前時(shí)間: ");
		
		panelCenter.add(new JScrollPane(text),BorderLayout.CENTER);
		panelButtom.add(label);
		panelButtom.add(labelFile);
		frame.add(panelCenter,BorderLayout.CENTER);
		frame.add(panelButtom,BorderLayout.SOUTH);
	}

	public void run()
	{
		try
		{
			while(true)
			{				
				Date date = new Date();
				label.setText("    當(dāng)前時(shí)間: "+date.toString());
				sleep(1000);
			}
		}
		catch(Exception e)
		{
		}
	}

	public void initFrameEvent()
	{
		frame.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		});
	}

	public void actionPerformed(ActionEvent e)
	{
		if (e.getSource()==fm1)
		{
			text.setText(null);
			openFile();
		}
		if (e.getSource()==fm2)
		{
			
		}
		if (e.getSource()==fm3)
		{
			System.exit(0);
		}
		if (e.getSource()==bm1)
		{
			text.selectAll();
		}
		if (e.getSource()==bm2)
		{
			text.setText(null);
		}
		if (e.getSource()==em)
		{
			System.exit(0);
		}
	}

	public void openFile()
	{
		byte buf[] = new byte[1024];
		JFileChooser openDialog = new JFileChooser("C:\\");
		openDialog.showOpenDialog(frame);
		selectFilename = openDialog.getSelectedFile();
		labelFile.setText("當(dāng)前操作:"+selectFilename.toString());
		try
		{
			if (selectFilename!=null)
			{
				fis = new FileInputStream(selectFilename);
				
				while (fis.read(buf)!=-1)
				{
					text.append(new String(buf));
					//fis.read(buf);
				}
			}
			fis.close();
		}
		catch(Exception e)
		{
			text.append("\n錯(cuò)誤:\n"+"   "+e);
		}
	}
}