Java lang.Long.byteValue() method in Java with Examples


java.lang.Long.byteValue() is a built-in function in Java that returns the value of this Long as a byte.

Syntax:

public byte byteValue()
Parameters: The function does not accept any parameter.
Return :
This method returns the numeric value 
represented by this object after conversion to byte type.

Examples:

Input : 12
Output : 12

Input : 1023
Output : -1

The program below illustrates the java.lang.Long.byteValue() function:

Program 1 :

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// Java program that demonstrates the use of
// Long.byteValue() function
  
// include lang package
import java.lang.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        Long value = 1023l;
  
        // returns the value of Long as a byte
        byte byteValue = value.byteValue();
        System.out.println("Byte Value of num = " + byteValue);
  
        // 2nd example
        value = 12l;
        byteValue = value.byteValue();
        System.out.println("Byte Value of num = " + byteValue);
    }
}

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Output:


Byte Value of num = -1
Byte Value of num = 12



Program 2 : Demonstrates the byte value of a negative number











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// Java program that demonstrates the use of 


// Long.byteValue() function 


// negative number 


  


// include lang package 


import java.lang.*; 


  


public class GFG { 


  


    public static void main(String[] args) 


    { 


  


        Long value = -1023l; 


  


        // returns the value of Long as a byte 


        byte byteValue = value.byteValue(); 


        System.out.println("Byte Value of num = " + byteValue); 


  


        // 2nd example 


        value = -12l; 


        byteValue = value.byteValue(); 


        System.out.println("Byte Value of num = " + byteValue); 


    } 


} 



















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Output:


Byte Value of num = 1
Byte Value of num = -12



Program 3 : When a decimal value is passed in argument.











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// Java program that demonstrates the use of 


// Long.byteValue() function 


// decimal number 


  


// include lang package 


import java.lang.*; 


  


public class GFG { 


  


    public static void main(String[] args) 


    { 


  


        Long value = 11.24; 


  


        // returns the value of Long as a byte 


        byte byteValue = value.byteValue(); 


        System.out.println("Byte Value of num = " + byteValue); 


    } 


} 



















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Output:


prog.java:13: error: incompatible types: double cannot be converted to Long
        Long value = 11.24;



Program 4 :  When a string value is passed in argument.











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// Java program that demonstrates the use of 


// Long.byteValue() function 


// string number 


  


// include lang package 


import java.lang.*; 


  


public class GFG { 


  


    public static void main(String[] args) 


    { 


  


        Long value = "24"; 


  


        // returns the value of Long as a byte 


        byte byteValue = value.byteValue(); 


        System.out.println("Byte Value of num = " + byteValue); 


    } 


} 



















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Output:


prog.java:13: error: incompatible types: String cannot be converted to Long
        Long value = "24";




          
          
          
          

            

    

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