Java.io.RandomAccessFile readUnsignedByte() Method

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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