Java - Double Class doubleToLongBits() Method

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

Double class doubleToLongBits() method

doubleToLongBits() method is available in Double class of java.lang package.
doubleToLongBits() method follows IEEE 754 double floating-point standards and according to standards, it returns the bits that denote floating-point value.
doubleToLongBits() 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.
doubleToLongBits() method does not throw an exception at the time of representing bits.

Syntax

public static long doubleToLongBits(double value);

Parameters

double value – This parameter represents the double precision floating point value.

Return Value

The return type of this method is long, it returns the bits that represent the double precision floating-point value.

Note:

If we pass positive infinity, it returns the value 0x7ff0000000000000L.
If we pass negative infinity, it returns the value 0xfff0000000000000L.
If we pass NaN, it returns the value 0x7ff8000000000000L.

Example

// Java program to demonstrate the example 
// of doubleToLongBits(double value)
// method of Double class

public class DoubleToLongBitsOfDoubleClass {
    public static void main(String[] args) {
        // Variables initialization
        double value1 = 18.20;
        double value2 = 19.20;

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

        // It returns the bits denoted by the double 
        // floating-point argument by calling 
        // Double.doubleToLongBits(value1)

        long result1 = Double.doubleToLongBits(value1);

        // It returns the bits denoted by the double 
        // floating-point argument by calling 
        // Double.doubleToLongBits(value2)
        long result2 = Double.doubleToLongBits(value2);

        // Display result1,result2 values
        System.out.println("Double.doubleToLongBits(value1): " + result1);
        System.out.println("Double.doubleToLongBits(value2): " + result2);
    }
}

Output

value1: 18.2
value2: 19.2
Double.doubleToLongBits(value1): 4625816062258262835
Double.doubleToLongBits(value2): 4626097537234973491

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