helpframe.java

图书管理系统

/**********************************
 * FileName:HelpFrame.java
 * Founction:帮助界面
 * Time:2004 1.12
 *********************************/

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

public class HelpFrame extends  Frame implements ActionListener 
{
	
	TextArea TAHelp = new TextArea();
	Button butCancel =new Button ("返回");
	
	HelpFrame()
	{
		super("帮助窗口");
		setLayout(new BorderLayout());
		add("Center",TAHelp);
		add("South",butCancel);
		butCancel.addActionListener(this);
		TAHelp.setEditable (false);
		setVisible (true);
		setSize(352,350);
		setResizable(false); 
		setLocation (375,250);
		
		addWindowListener(new WindowAdapter() 
      	{
        	public void windowClosing(WindowEvent e) 
        	{
            	System.exit(0);
        	}
	    });
	
	}	
	
	void txtDisplay()
	{
		String txtHelp="\t\t图书管理系统\n\n\n"+
				       "功能：图书查询、图书借阅、图书归还、读者资料查询\n\n"+
					   "图书查询：根据书名查询图书,不输入书名点击查询\n"+
					   "          可查询所有图书。\n\n"+          
					   "图书借阅：根据书本ID查询图书借阅记录，判断要借\n"+
			           "          的书是否被借了,若有记录则此书被借了\n"+ 
					   "          读者不能借，反之可以借阅。借阅图书要输入\n"+
					   "          用户ID。\n\n"+
					   "图书归还：根据书本ID查询图书借阅记录、若单击归还\n"+
			           "          则可以归还读者借阅的书本。\n\n"+
					   "读者资料查询：根据用户名查询读者资料信息,不输入\n"+
					   "          用户名点击查询可查询所有读者资料。";
		
		TAHelp.setText (txtHelp);
	}
	
	public void actionPerformed(ActionEvent e)
	{
		if(e.getActionCommand () == "返回")
	   {
			dispose();
		}
	}
}