helpframe.java

来自「一个小的编译器,可以模仿类似c语言的语法。很适合初级java学习者」· Java 代码 · 共 56 行

import java.awt.*;
import javax.swing.*;
import java.io.*;
import java.awt.event.*;

public class HelpFrame extends JFrame
{
	TextArea helpArea;
	byte buffer[];
	int bufferLength;
	
	public HelpFrame()
	{
		buffer = new byte[1000000];
		try
		{
			File file = new File("help","help.txt");
			if(!file.exists())
			{
				System.err.println("The help text is not exist");
			}
	
			FileInputStream fileInputStream = new FileInputStream(file);
			bufferLength = fileInputStream.read(buffer);
			fileInputStream.close();
		}
		catch(Exception e)
		{
			System.err.println("Help text is not existing");
		}
		
		String string = new String(buffer);
		helpArea = new TextArea(string);
		helpArea.setBackground(Color.LIGHT_GRAY);
		helpArea.setEditable(false);
		
		setTitle("Help Text");
		setSize(500,450);
		getContentPane().add(helpArea);
	//	pack();
		
		///////add windowlistener////////////
		addWindowListener
		(
			new WindowAdapter()
			{
				public void windowClosing(WindowEvent we)
				{
					setVisible(false);
				}
			}
		);
	}
	
	
}