Java Byte valueOf() method

The valueOf() method of Java Byte class returns a byte object holding the specified byte value for the specified String.

The third syntax returns a Byte object which represents the specified String when parsed with the given radix.

Syntax:

public static Byte valueOf (byte b)  
public static Byte valueOf(String s) throws NumberFormatException
public static Byte valueOf(String s, int radix) throws NumberFormatException

Parameters:

x - A byte value

s - The string to be parsed

radix- The radix to be used in interpreting s

Throws

The valueOf() method throws:

NumberFormatException - if the string does not contain a parsable byte.

Return Value

This method returns a byte object holding the value represented by b or by the string or by the string argument in the specified radix.

Example 1

public class JavaByteValueOfExample1 {
    public static void main(String[] args) {
        // returns a byte object holding the specified byte value
        Byte byte1=8;
        System.out.println("valueOf() method returns : "+Byte.valueOf(byte1));
    }
}

Test it Now

Output:

valueOf() method returns : 8

Example 2

public class JavaByteValueOfExample2 {
    public static void main(String[] args) {
        // returns a byte object holding the specified String value
        String str="56";
        System.out.println("valueOf() method returns : "+Byte.valueOf(str));
    }
}

Test it Now

Output:

valueOf() method returns : 56

Example 3

public class JavaByteValueOfExample3 {
    public static void main(String[] args) {
        // returns a byte object holding the specified String value
        String str="null";
        //return an exception if the string does not contain a parsable byte
        System.out.println("valueOf() method returns : "+Byte.valueOf(str));
    }
}

Test it Now

Output:

Exception in thread "main" java.lang.NumberFormatException: For input string: "null"
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Integer.parseInt(Integer.java:580)
	at java.lang.Byte.parseByte(Byte.java:149)
	at java.lang.Byte.valueOf(Byte.java:205)
	at java.lang.Byte.valueOf(Byte.java:231)
	at com.JavaTpoint.JavaByteValueOfExample3.main(JavaByteValueOfExample3.java:7)

Example 4

public class JavaByteValueOfExample4 {
    public static void main(String[] args) {
        // returns a Byte object which represents the specified String when parsed with the given radix
        String str="36";
        int radix=Character.MAX_RADIX;
        //return an exception if the string does not contain a parsable byte
        System.out.println("valueOf() method returns : "+Byte.valueOf(str,radix));
    }
}

Test it Now

Output: