import java.awt.*;
import java.awt.event.*;
import java.io.*;
class MenuTest
{
	public static void main(String[] args)
	{
		//創建框架窗口
		final Frame f = new Frame("My First Java Program");
		f.setSize(600, 400);
		f.setLocation(200, 100);
		//創建菜單
		MenuBar mb = new MenuBar();
		Menu m1 = new Menu("File");
		Menu m2 = new Menu("Edit");
		MenuItem mi1 = new MenuItem("New");
		MenuItem mi2 = new MenuItem("Open");
		MenuItem mi3 = new MenuItem("Close");
		MenuItem mi4 = new MenuItem("Exit");
		MenuItem mi5 = new MenuItem("Copy");
		MenuItem mi6 = new MenuItem("Paste");
		m1.add(mi1);
		m1.add(mi2);
		m1.add(mi3);
		m1.add(mi4);
		m2.add(mi5);
		m2.add(mi6);
		mb.add(m1);
		mb.add(m2);
		//創建文本框
		final TextArea ta = new TextArea();
		f.add(ta);
		//菜單命令響應
		mi4.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				//退出系統
				System.exit(0);
			}
		});
		mi2.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				//顯示文件對話框
				FileDialog fd = new FileDialog(f, "Loading File", FileDialog.LOAD);
				fd.show();
				//以下代碼要等文件窗口關閉后才執行
				System.out.println("after show fileDialog!");
				String strFile = /*fd.getDirectory() + */fd.getFile();
				byte[] data = new byte[10 * 1024];
				if (strFile != null)
				{
					try
					{
						FileInputStream fis = new FileInputStream(strFile);
						int len = fis.read(data);
						ta.append(new String(data, 0, len));
					}
					catch(FileNotFoundException ex)
					{
						System.out.println(ex);
					}
					catch(IOException ex)
					{
						System.out.println(ex);
					}
				}
			}
		});
		
		//設置框架窗口菜單對象
		f.setMenuBar(mb);
		//框架窗口事件委托
		f.addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		});
		f.show();
		//顯示框架窗口后，下面代碼會馬上緊跟執行
		System.out.println("after show frame!");
	}
}