Java Tutorial
- Java - Home
- Java - Overview
- Java - History
- Java - Features
- Java vs C++
- Java Virtual Machine (JVM)
- Java - JDK vs JRE vs JVM
- Java - Hello World Program
- Java - Environment Setup
- Java - Basic Syntax
- Java - Variable Types
- Java - Data Types
- Java - Type Casting
- Java - Unicode System
- Java - Basic Operators
- Java - Comments
- Java - User Input
Java Control Statements
- Java - Loop Control
- Java - Decision Making
- Java - If-else
- Java - Switch
- Java - For Loops
- Java - For-Each Loops
- Java - While Loops
- Java - do-while Loops
- Java - Break
- Java - Continue
Object Oriented Programming
- Java - OOPs Concepts
- Java - Object & Classes
- Java - Class Attributes
- Java - Class Methods
- Java - Methods
- Java - Variables Scope
- Java - Constructors
- Java - Access Modifiers
- Java - Inheritance
- Java - Aggregation
- Java - Polymorphism
- Java - Overriding
- Java - Method Overloading
- Java - Dynamic Binding
- Java - Static Binding
- Java - Instance Initializer Block
- Java - Abstraction
- Java - Encapsulation
- Java - Interfaces
- Java - Packages
- Java - Inner Classes
- Java - Static Class
- Java - Anonymous Class
- Java - Singleton Class
- Java - Wrapper Classes
- Java - Enums
- Java - Enum Constructor
- Java - Enum Strings
Java Built-in Classes
- Java - Number
- Java - Boolean
- Java - Characters
- Java - Strings
- Java - Arrays
- Java - Date & Time
- Java - Math Class
Java File Handling
- Java - Files
- Java - Create a File
- Java - Write to File
- Java - Read Files
- Java - Delete Files
- Java - Directories
- Java - I/O Streams
Java Error & Exceptions
- Java - Exceptions
- Java - try-catch Block
- Java - try-with-resources
- Java - Multi-catch Block
- Java - Nested try Block
- Java - Finally Block
- Java - throw Exception
- Java - Exception Propagation
- Java - Built-in Exceptions
- Java - Custom Exception
Java Multithreading
- Java - Multithreading
- Java - Thread Life Cycle
- Java - Creating a Thread
- Java - Starting a Thread
- Java - Joining Threads
- Java - Naming Thread
- Java - Thread Scheduler
- Java - Thread Pools
- Java - Main Thread
- Java - Thread Priority
- Java - Daemon Threads
- Java - Thread Group
- Java - Shutdown Hook
Java Synchronization
- Java - Synchronization
- Java - Block Synchronization
- Java - Static Synchronization
- Java - Inter-thread Communication
- Java - Thread Deadlock
- Java - Interrupting a Thread
- Java - Thread Control
- Java - Reentrant Monitor
Java Networking
- Java - Networking
- Java - Socket Programming
- Java - URL Processing
- Java - URL Class
- Java - URLConnection Class
- Java - HttpURLConnection Class
- Java - Socket Class
- Java - Generics
Java Collections
Java List Interface
Java Queue Interface
Java Map Interface
- Java - Map Interface
- Java - HashMap
- Java - LinkedHashMap
- Java - WeakHashMap
- Java - EnumMap
- Java - SortedMap Interface
- Java - TreeMap
- Java - The IdentityHashMap Class
Java Set Interface
- Java - Set Interface
- Java - HashSet
- Java - EnumSet
- Java - LinkedHashSet
- Java - SortedSet Interface
- Java - TreeSet
Java Data Structures
- Java - Data Structures
- Java - Enumeration
- Java - BitSet Class
- Java - Dictionary
- Java - Hashtable
- Java - Properties
Java Collections Algorithms
Advanced Java
- Java - Command-Line Arguments
- Java - Lambda Expressions
- Java - Sending Email
- Java - Applet Basics
- Java - Javadoc Comments
- Java - Autoboxing and Unboxing
- Java - File Mismatch Method
- Java - REPL (JShell)
- Java - Multi-Release Jar Files
- Java - Private Interface Methods
- Java - Inner Class Diamond Operator
- Java - Multiresolution Image API
- Java - Collection Factory Methods
- Java - Module System
- Java - Nashorn JavaScript
- Java - Optional Class
- Java - Method References
- Java - Functional Interfaces
- Java - Default Methods
- Java - Base64 Encode Decode
- Java - Switch Expressions
- Java - Teeing Collectors
- Java - Microbenchmark
- Java - Text Blocks
- Java - Null Pointer Exception
- Java - Packaging Tools
- Java - Sealed Classes
- Java - Record Classes
- Java - Hidden Classes
- Java - Compact Number Formatting
- Java - Garbage Collection
- Java - JIT Compiler
Java Miscellaneous
- Java - Recursion
- Java - Regular Expressions
- Java - Serialization
- Java - Strings
- Java - Process API Improvements
- Java - Stream API Improvements
- Java - Enhanced @Deprecated Annotation
- Java - CompletableFuture API Improvements
- Java - Array Methods
- Java - Streams
- Java - Datetime Api
- Java 8 - New Features
- Java 9 - New Features
Java APIs & Frameworks
Java Useful Resources
Java - byte Keyword
byte Keyword
Java byte keyword is used to define one of the eight primitive data types supported by Java. It provides a means to create byte-type variables which can accept a byte value.
Characteristics
Following are the characteristics of a byte data type.
Byte data type is an 8-bit signed two's complement integer
Minimum value is -128 (-2^7)
Maximum value is 127 (inclusive)(2^7 -1)
Default value is 0
Byte data type is used to save space in large arrays, mainly in place of integers, since a byte is four times smaller than an integer.
Example − byte a = 100, byte b = -50
Syntax
The syntax of byte keyword to declare a byte variable is as follows:
byte variable_name;
Default Value
The default of a variable declared using the byte keyword is 0.
byte Variable
A byte variables represents a reserved memory locations to store byte values. This means that when you create a variable you reserve some space in the memory.
Based on the data type of a variable, the operating system allocates memory and decides what can be stored in the reserved memory. Therefore, by assigning different data types to variables, you can store byte values in byte variables.
Examples of byte Keyword
Example 1
Following example shows the usage of byte primitive data type we've discussed above. We've created a byte variable as byteValue and assigned it a byte value. Then this variable is printed.
package com.tutorialspoint; public class JavaTester { public static void main(String args[]) { byte byteValue = 2; System.out.println("Byte: " + byteValue); } }
Output
Byte: 2
Example 2
Following example shows the usage of byte primitive data type in an expression. We've created two byte variables and assigned them byte values. Then we're creating a new byte variable byteResult to assign it the sum of byte variables. Finally result is printed.
package com.tutorialspoint; public class JavaTester { public static void main(String args[]) { byte byteValue1 = 2; byte byteValue2 = 4; byte byteResult = (byte)(byteValue1 + byteValue2); System.out.println("Byte: " + byteResult); } }
Output
Byte: 6
Example 3
Following example shows the usage of byte variable with an invalid value. We've created a byte variable as byteValue and assigned it an out of range value.
package com.tutorialspoint; public class JavaTester { public static void main(String args[]) { byte byteValue = 234; System.out.println("Byte: " + byteValue); } }
Output
Exception in thread "main" java.lang.Error: Unresolved compilation problem: Type mismatch: cannot convert from int to byte at com.tutorialspoint.JavaTester.main(JavaTester.java:5)
To Continue Learning Please Login
Login with Google