Byte class with Examples

Introduction

The Java Byte class class wraps a value of primitive type byte in an object. An object of type Byte contains a single field whose type is byte.

Class Declaration

Following is the declaration for java.lang.Byte class −

publicfinalclassByteextendsNumberimplementsComparable<Byte>

Learn Java in-depth with real-world projects through our Java certification course. Enroll and become a certified expert to boost your career.

Field

Following are the fields for java.lang.Byte class −

• static byte MAX_VALUE − This is constant holding the maximum value a byte can have, 2⁷-1.
• static byte MIN_VALUE − This is constant holding the minimum value a byte can have, -2⁷.
• static int SIZE − This is the number of bits used to represent a byte value in two’s complement binary form.
• static Class<Byte> TYPE − This is the Class instance representing the primitive type byte.

Class constructors

Sr.No.	Constructor & Description
1	Byte(byte value)This constructs a newly allocated Byte object that represents the specified byte value.
2	Byte(String s)This constructs a newly allocated Byte object that represents the byte value indicated by the String parameter.

Class methods

Sr.No.	Method & Description
1	byte byteValue()This method returns the value of this Byte as a byte.
2	int compareTo(Byte anotherByte)This method compares two Byte objects numerically.
3	static Byte decode(String nm)This method decodes a String into a Byte.
4	double doubleValue()This method returns the value of this Byte as a double.
5	boolean equals(Object obj)This method compares this object to the specified object.
6	float floatValue()This method returns the value of this Byte as a float.
7	int hashCode()This method returns a hash code for this Byte.
8	int intValue()This method returns the value of this Byte as an int.
9	long longValue()This method returns the value of this Byte as a long.
10	static byte parseByte(String s)This method parses the string argument as a signed decimal byte.
11	static byte parseByte(String s, int radix)This method parses the string argument as a signed byte in the radix specified by the second argument.
12	short shortValue()This method returns the value of this Byte as a short.
13	String toString()This method returns a String object representing this Byte’s value.
14	static String toString(byte b)This method returns a new String object representing the specified byte.
15	static Byte valueOf(byte b)This method returns a Byte instance representing the specified byte value.
16	static Byte valueOf(String s)This method returns a Byte object holding the value given by the specified String.
17	static Byte valueOf(String s, int radix)This method returns a Byte object holding the value extracted from the specified String when parsed with the radix given by the second argument.

Methods inherited

This class inherits methods from the following classes −

• java.lang.Object

Example

The following example shows the usage of Byte class to get byte from a string.

Open Compiler

packagecom.tutorialspoint;publicclassByteDemo{publicstaticvoidmain(String[] args){// create a String s and assign value to itString s ="+120";// create a Byte object bByte b;// get the value of byte from string
      b =Byte.valueOf(s);// print the valueSystem.out.println("Byte value of string "+ s +" is "+ b );}}

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

Byte value of string +120 is 120