BeginnersBook

  • Home
  • Java
    • Java OOPs
    • Java Collections
    • Java Examples
  • C
    • C Examples
  • C++
    • C++ Examples
  • DBMS
  • Computer Network
  • Python
    • Python Examples
  • More…
    • jQuery
    • Kotlin
    • WordPress
    • SEO
    • JSON
    • JSP
    • JSTL
    • Servlet
    • MongoDB
    • XML
    • Perl

What is byte Keyword in Java

By Chaitanya Singh | Filed Under: java

The byte keyword has following two usages in Java:

  • byte data type
  • byte return type of a method

The byte keyword is used to define a primitive data type. A byte data type variable can hold values ranging from -128 to 127. The size of byte data type is 8 bit.

It can also be used as a return type of a method.

byte Keyword Examples

Example 1:

class JavaExample {
  public static void main(String args[]) {
    byte num = 100, num2 = -50;
    System.out.println(num);
    System.out.println(num2);
  }
}

Output:

100
-50

Example 2:

This program will throw error as the max value that a byte data type can handle is 127 and the minimum value it can handle is -128.

class JavaExample {
  public static void main(String args[]) {
    byte num = 200;
    System.out.println(num);
  }
}

Output:

byte keyword example output

Example 3:

In this example, we have a method with byte return type. This method takes int argument as input and returns byte equivalent, if input value falls in the valid byte range.

class JavaExample {
  public static byte myMethod(int num){
    byte bVar;
    if(num<=127 || num>=-128){
      bVar = (byte)num; //type casting
    }else{
      System.out.println("Byte can only hold values between -128 to 127");
      bVar = 0;
    }
    return bVar;
  }
  public static void main(String args[]) {
    int num = 101;
    System.out.println("Given int to byte: "+myMethod(num));
  }
}

Output:

Given int to byte: 101

Related guides:

  • Java Data Types Tutorial
  • Java Wrapper Class Tutorial
  • Java Type Casting Tutorial
❮ Java Keywords

Top Related Articles:

  1. Kotlin Variables and Data Types
  2. Data Types in Java
  3. Java Integer byteValue() Method
  4. Java Keywords With Examples
  5. Method Overloading in Java with examples

About the Author

I have 15 years of experience in the IT industry, working with renowned multinational corporations. Additionally, I have dedicated over a decade to teaching, allowing me to refine my skills in delivering information in a simple and easily understandable manner.

– Chaitanya

Java Tutorial

Java Introduction

  • Java Index
  • Java Introduction
  • History of Java
  • Features of Java
  • C++ vs Java
  • JDK vs JRE vs JVM
  • JVM - Java Virtual Machine
  • First Java Program
  • Variables
  • Data Types
  • Operators

Java Flow Control

  • Java If-else
  • Java Switch-Case
  • Java For loop
  • Java while loop
  • Java do-while loop
  • Continue statement
  • break statement

Java Arrays

  • Java Arrays

OOPs Concepts

  • OOPs Concepts
  • Constructor
  • Java String
  • Static keyword
  • Inheritance
  • Types of inheritance
  • Aggregation
  • Association
  • Super Keyword
  • Method overloading
  • Method overriding
  • Overloading vs Overriding
  • Polymorphism
  • Types of polymorphism
  • Static and dynamic binding
  • Abstract class and methods
  • Interface
  • Abstract class vs interface
  • Encapsulation
  • Packages
  • Access modifiers
  • Garbage Collection
  • Inner classes
  • Static import
  • Static constructor

Java Exception Handling

  • Exception handling
  • Java try-catch
  • Java throw
  • Java throws
  • Checked and Unchecked Exceptions
  • Jav try catch finally
  • Exception Examples
  • Exception Propagation

Collections Framework

  • Collections in Java
  • Java ArrayList
  • Java LinkedList
  • Java Vector
  • Java HashSet
  • Java LinkedHashSet
  • Java TreeSet
  • Java HashMap
  • Java TreeMap
  • Java LinkedHashMap
  • Java Queue
  • Java PriorityQueue
  • Java Deque
  • Comparable interface
  • Comparator interface
  • Collections Interview Questions

MORE ...

  • Java Scanner Class
  • Java 8 Features
  • Java 9 Features
  • Java Conversion
  • Java Date
  • Java Multithreading
  • Java I/O
  • Java Serialization
  • Java Regex
  • Java AWT
  • Java Swing
  • Java Enum
  • Java Annotations
  • Java main method
  • Java Interview Q

Copyright © 2012 – 2023 BeginnersBook . Privacy Policy . Sitemap