Java - Double Class longBitsToDouble() Method

Double class longBitsToDouble() method: Here, we are going to learn about the longBitsToDouble() method of Double class with its syntax and example. By Preeti Jain Last updated : March 23, 2024

Double class longBitsToDouble() method

longBitsToDouble() method is available in Double class of java.lang package.
longBitsToDouble() method is used to return the double value corresponding to the given long bit denotation followed by IEEE 754 double floating-point standards.
longBitsToDouble() method is a static method, it is accessible with the class name too and if we try to access the method with the class object then also we will not get an error.
longBitsToDouble() method does not throw an exception at the time of representing bits.

Syntax

public static double longBitsToDouble(long bits_rep);

Parameters

long bits_rep – represents the long integer value.

Return Value

The return type of this method is double, it returns the bits that represent the long integer value.

Note:

If we pass "0x7ff0000000000000L", it returns the value "positive infinity".
If we pass "0xfff0000000000000L", it returns the value "negative infinity".

Example

// Java program to demonstrate the example 
// of longBitsToDouble(long bits_rep)
// method of Double class

public class LongBitsToDoubleOfDoubleClass {
    public static void main(String[] args) {
        // Variables initialization
        double d1 = 18.20;
        double d2 = 19.20;

        // Display value1,value2 values
        System.out.println("d1: " + d1);
        System.out.println("d2: " + d2);

        // Double instance creation
        Double value1 = new Double(d1);
        Double value2 = new Double(d2);


        // It returns the double value denoted by the given bit denotation 
        //by calling value1.longBitsToDouble(124568)
        double result1 = value1.longBitsToDouble(124568);

        // It returns the double value denoted by the given bit denotation 
        //by calling value1.longBitsToDouble(124568)

        double result2 = value2.longBitsToDouble(0xfff0000000000000L);

        // Display result1,result2 values
        System.out.println("value1.longBitsToDouble(124568): " + result1);
        System.out.println("value2.longBitsToDouble(0xfff0000000000000L): " + result2);
    }
}

Output

d1: 18.2
d2: 19.2
value1.longBitsToDouble(124568): 6.1545E-319
value2.longBitsToDouble(0xfff0000000000000L): -Infinity

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