Java Byte doubleValue() method

The doubleValue() method of Java Byte class returns a double value for this Byte after a widening primitive conversion.

Syntax:

Parameters:

Overrides

This method is specified by doubleValue in class Number

Return Value

This method returns the numeric value of this object after conversion to type double.

Example 1

public class JavaByteDoubleValueExample1 {
    public static void main(String[] args) {
        Byte b1=98;
        Byte b2=102;
        //returns the numeric value of this object after conversion to type double.
        Double d1=b1.doubleValue();
        System.out.println("1. Double value : "+d1);
        System.out.println("2. Double value : "+b2.doubleValue());
    }
}

Test it Now

Output:

Double value : 98.0
Double value : 102.0

Example 2

public class JavaByteDoubleValueExample2 {
    public static void main(String[] args) {
        Byte byte1=Byte.MIN_VALUE;
        Byte byte2=Byte.MAX_VALUE;;
        System.out.println("1. "+byte1.doubleValue());
        System.out.println("2. "+byte2.doubleValue());
    }
}

Test it Now

Output:

 -128.0
127.0

Example 3

public class JavaByteDoubleValueExample3 {
    public static void main(String[] args) {
        //byte1 is a primitive data type object, it can?t be used to call Byte class methods
        byte byte1=7;
        Byte byte2=Byte.MAX_VALUE;;
        System.out.println("1. "+byte1.doubleValue());
        System.out.println("2. "+byte2.doubleValue());
    }
}

Test it Now

Output:

Error:(7, 39) java: byte cannot be dereferenced

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Java Byte doubleValue() method

Syntax:

Parameters:

Overrides

Return Value

Example 1

Example 2