Home » Java programming language

Java DataInputStream readUnsignedByte() Method with Example

DataInputStream Class readUnsignedByte() method: Here, we are going to learn about the readUnsignedByte() method of DataInputStream Class with its syntax and example.
Submitted by Preeti Jain, on March 30, 2020

DataInputStream Class readUnsignedByte() method

  • readUnsignedByte() method is available in java.io package.
  • readUnsignedByte() method is used to read 1 byte (i.e. 8 bit) of data input and returns an unsigned byte value read.
  • readUnsignedByte() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • readUnsignedByte() method may throw an exception at the time of reading byte.
    • IOException: This exception may throw when this stream is not opened.
    • EndOfFileException: This exception may throw when this stream has reached its endpoint.

Syntax:

    public final int readUnsignedByte();

Parameter(s):

  • It does not accept any parameter.

Return value:

The return type of the method is int, it returns 1 byte of data input, manipulated as an unsigned byte value.

Example:

// Java program to demonstrate the example // of int readUnsignedByte() method of // DataInputStream import java.io.*; public class ReadUnsignedByteOfDIS { public static void main(String[] args) throws IOException { InputStream is_stm = null; DataInputStream dis_stm = null; FileOutputStream fos_stm = null; DataOutputStream dos_stm = null; byte[] b_arr = { 125, 111, -121, -112 }; try { // Instantiate FileInputStream, // DataInputStream, FileOutputStream // and DataOutputStream fos_stm = new FileOutputStream("C:\\Users\\Preeti Jain\\Desktop\\programs\\includehelp.txt"); dos_stm = new DataOutputStream(fos_stm); // Loop to write each byte till end for (byte val: b_arr) { // By using writeByte() method isto // write a byte value to the // DataOutputStream dos_stm dos_stm.writeByte(val); } is_stm = new FileInputStream("C:\\Users\\Preeti Jain\\Desktop\\programs\\includehelp.txt"); dis_stm = new DataInputStream(is_stm); // Loop To Read Available Data till end while (dis_stm.available() > 0) { // By using readUnsignedByte() method isto read // unsigned byte at a time from dis_stm int in = dis_stm.readUnsignedByte(); System.out.println("dis_stm.readUnsignedByte(): " + in ); } } catch (Exception ex) { System.out.println(ex.toString()); } finally { // To free system resources linked // with these streams if (is_stm != null) is_stm.close(); if (dis_stm != null) dis_stm.close(); if (dos_stm != null) dos_stm.close(); if (fos_stm != null) fos_stm.close(); } } }

Output

dis_stm.readUnsignedByte(): 125
dis_stm.readUnsignedByte(): 111
dis_stm.readUnsignedByte(): 135
dis_stm.readUnsignedByte(): 144
Advertisement
Advertisement


Comments and Discussions!

Load comments ↻


Advertisement
Advertisement
Advertisement



Copyright © 2024 www.includehelp.com. All rights reserved.