Hi Friend,

Actually you are reading a file that has been created but it does not contain any data.Therefore error occurs.So use writeBytes() method first to write the data into the file and then read that file data using readByte() method.

Here is the modified code:

import java.io.File;
import java.io.RandomAccessFile;
import java.io.IOException;
public class randomdemo {
private static void doAccess() {
try {
File file = new File("DemoRandomAccessFile.out");
RandomAccessFile raf = new RandomAccessFile(file, "rw");
raf.seek(file.length());
raf.write(0x0A);
raf.writeBytes("This will complete the Demo");
int i=(int)raf.length();
System.out.println("Length: " + i);
raf.seek(0);
for(int ct = 0; ct < i; ct++){
byte b = raf.readByte();
System.out.print((char)b);
}
raf.close();
} catch (IOException e) {
System.out.println("IOException:");
e.printStackTrace();
}
}
public static void main(String[] args) {
doAccess();
}
}

Thanks