The java.lang.Double.doubleToLongBits() method of Java Double class is a built-in function in java that returns a representation of the specified floating-point value according to the IEEE 754 floating-point “double format” bit layout.
Syntax:
public static long doubleToLongBits(double val)
Parameter: The method accepts only one parameter val which specifies a double precision floating-point number.
Return Values: The function returns the bits that represent the floating-point number. Below are the special cases:
- If the argument is positive infinity, the result is 7ff0000000000000L.
- If the argument is negative infinity, the result is 0xfff0000000000000L.
- If the argument is NaN, the result is 0x7ff8000000000000L.
Below programs illustrates the use of java.lang.Double.doubleToLongBits() method:
Program 1:
// Java program to demonstrate// Double.doubleToLongBits() method import java.lang.*; class Gfg1 { public static void main(String args[]) { double val = 1.5d; // function call long answer = Double.doubleToLongBits(val); // print System.out.println(val + " in long bits: " + answer); }} |
Output:
1.5 in long bits: 4609434218613702656
Program 2:
// Java program to demonstrate// Double.doubleToLongBits() method import java.lang.*; class Gfg1 { public static void main(String args[]) { double val = Double.POSITIVE_INFINITY; double val1 = Double.NEGATIVE_INFINITY; double val2 = Double.NaN; // function call long answer = Double.doubleToLongBits(val); // print System.out.println(val + " in long bits: " + answer); // function call answer = Double.doubleToLongBits(val1); // print System.out.println(val1 + " in long bits: " + answer); // function call answer = Double.doubleToLongBits(val2); // print System.out.println(val2 + " in long bits: " + answer); }} |
Output:
Infinity in long bits: 9218868437227405312 -Infinity in long bits: -4503599627370496 NaN in long bits: 9221120237041090560
Reference: https://docs.oracle.com/javase/7/docs/api/java/lang/Double.html#doubleToLongBits(double)
