appletwritefiletest.java

高等院校计算机应用技术硕士研究生课程,高级计算机网络程序设计实例子代码,SECURE部分.

import java.awt.*;
import java.io.*;
import java.lang.*;
import java.applet.*;

public class AppletWriteFileTest extends Applet 
{
	File f = new File("test.txt");
	DataOutputStream dos;
    
    	public void init() 
    	{ 
        	System.out.println("AppletWriteFileTest init ;");
    	}

    	public void paint(Graphics g) 
    	{
        	try 
        	{
            		//向本地写一个文件
            		dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(f)));
            		dos.writeChars("hello , this is something test!!!");
            		dos.flush();
            		//如果成功显示成功信息
            		g.drawString("test successfully !!!!!", 10, 10);
        	}
        	catch (SecurityException e) 
        	{
            		//输出例外栈
            		e.printStackTrace();
            		g.drawString("security exception: " + e, 10, 10);
        	}
        	catch (IOException ioe) 
        	{
            		g.drawString("i/o exception", 10, 10);
        	}
    	}
}