writefile.java

Java与面向对象程序设计实验教学讲义.复数类的实现,复数类的复杂运算,身份证号码的分析,图形界面设计

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

public class WriteFile extends Applet {
    String myFile = "writetest";
    File f = new File(myFile);
    DataOutputStream dos;

   public void paint(Graphics g) {
	try {
  	  dos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(myFile),128));

	  dos.flush();
	  g.drawString("Successfully wrote to the file named " + myFile + " -- go take a look at it!", 10, 10);
	}
	catch (SecurityException e) {
	  g.drawString("writeFile: caught security exception: " + e, 10, 10);
        }
	catch (IOException ioe) {
		g.drawString("writeFile: caught i/o exception", 10, 10);
        }
   }
}