Java.io.RandomAccessFile.readUnsignedByte() Method

Description

The java.io.RandomAccessFile.readUnsignedByte() method reads an unsigned eight-bit number from this file. This method reads a byte from this file, starting at the current file pointer, and returns that byte.

Declaration

Following is the declaration for java.io.RandomAccessFile.readUnsignedByte() method

public final int readUnsignedByte()

Parameters

• NA

Return Value

This method returns the next byte of this file, interpreted as an unsigned eight-bit number.

Exception

• IOException − if an I/O error occurs.

• EOFException − if this file has reached the end.

Example

The following example shows the usage of java.io.RandomAccessFile.readUnsignedByte() method.

package com.tutorialspoint;

import java.io.*;

public class RandomAccessFileDemo {
   public static void main(String[] args) {
      try {
         // create a new RandomAccessFile with filename test
         RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

         // write something in the file
         raf.writeUTF("Hello World");

         // set the file pointer at 0 position
         raf.seek(0);

         // print the byte
         System.out.println("" + raf.readUnsignedByte());

         // set the file pointer at 7 position
         raf.seek(7);

         // print the byte
         System.out.println("" + raf.readUnsignedByte());
      } catch (IOException ex) {
         ex.printStackTrace();
      }

   }
}

Assuming we have a text file c:/test.txt, which has the following content. This file will be used as an input for our example program:

ABCDE  

Let us compile and run the above program, this will produce the following result:

0
32