stockframe.java

《移动Agent技术》一书的所有章节源代码。

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import java.lang.String.*;
import java.util.*;


public class StockFrame extends Frame implements ActionListener
{
	String strLabel1B=" Welcome to Stock Custody System";
	String strLabel2B="     Please Input ";
	String strLabel3B="    Stock Price ";
	String strLabel4B=" Number of Exchange";
	String strButton1B="ENTER";
	String strLabel1,strLabel2,strLabel3,strLabel4,strButton1;
	Label label1;
	Label label2;
	Label label3;
	Label label4;
	Button button1;
	private TextField textfield1=new TextField(10);
	private TextField textfield2=new TextField(10);
	
	private boolean laidOut=false;
	RandomAccessFile dataFile;
	String readStr="";

	Image img;

	public StockFrame()
	{
		try
		{
			strLabel1=new String(strLabel1B.getBytes("GB2312"),"GB2312");
			strLabel2=new String(strLabel2B.getBytes("GB2312"),"GB2312");
			strLabel3=new String(strLabel3B.getBytes("GB2312"),"GB2312");
			strLabel4=new String(strLabel4B.getBytes("GB2312"),"GB2312");
			strButton1=new String(strButton1B.getBytes("GB2312"),"GB2312");
		}
		catch(Exception e)
		{
		}  
			label1=new Label(strLabel1);
			label2=new Label(strLabel2);
			label3=new Label(strLabel3);
			label4=new Label(strLabel4); 
			button1=new Button(strButton1);

			setLayout(null);
			add(label1);
			add(label2);	
			add(label3);	
			add(label4);		
			add(textfield1);
			add(textfield2);
			add(button1);	

		button1.addActionListener(this);
		addWindowListener(new closeWin());
		setTitle("Stock Custody System PDA Frame");
		setSize(240,320); 
		setVisible(true);

		img=getToolkit().getImage("e:\\leap\\src\\examples\\stock.jpg");
		setSize(240,320);		
	}

	public void paint(Graphics g)
	{
		if(!laidOut)
		{
			Insets insets=insets();
			label1.reshape(20+insets.left,30+insets.top,195,20);
			label2.reshape(60+insets.right,90+insets.top,100,20);
			label3.reshape(25+insets.left,130+insets.top,120,20);
			textfield1.reshape(160+insets.right,130+insets.top,50,20);
			label4.reshape(25+insets.left,180+insets.top,120,20);
			textfield2.reshape(160+insets.right,180+insets.top,50,20);
			button1.reshape(90+insets.right,250+insets.bottom,50,20);
			laidOut=true;
		}

		g.drawImage(img,5,20,this);
	}

	public void actionPerformed(ActionEvent ae)
	{
		try
		{ 
			dataFile = new RandomAccessFile("XXX.txt","rw");

			if(ae.getSource()==button1)
			{
				dataFile.writeBytes(textfield1.getText()+","+textfield2.getText()+"                                                                                     ");
			}
		}
		catch(Exception ie)
		{
		}
		displayData();
	}

	public void displayData()
	{
		long fileSize=-1;
		byte buffer[]=null;
		try
		{
			RandomAccessFile readFile = new RandomAccessFile("XXX.txt","r");
			fileSize = readFile.length();
			buffer = new byte[(int)fileSize];
			readFile.readFully(buffer,0,(int)fileSize);
			readFile.close();
		}
		catch(Exception oe)
		{    
			System.out.println("can't find XXX.txt ");
		}

		String tempStr = new String(buffer, 0,(int)fileSize);
		StringTokenizer st = new StringTokenizer(tempStr.trim(),",");
		while(st.hasMoreTokens())
		{
			System.out.println(st.nextToken());
		} 		
	}
	public static void main(String[] args) 
	{
		StockFrame s=new StockFrame();

		s.setVisible(true);
	}
}

class closeWin extends WindowAdapter
{
	public void windowClosing(WindowEvent we)
	{
		Frame frame=(Frame)(we.getSource());
		frame.dispose();
		System.exit(0);
	}
}