Java - Double longBitsToDouble(long) method

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Description

The Java Double longBitsToDouble() method returns the double value corresponding to a given bit representation. The argument is considered to be a representation of a floating-point value according to the IEEE 754 floating-point "double format" bit layout.It includes the following important points −

  • If the argument is 0x7ff0000000000000L, the result is positive infinity.
  • If the argument is 0xfff0000000000000L, the result is negative infinity.

Declaration

Following is the declaration for java.lang.Double.longBitsToDouble() method

public static double longBitsToDouble(long bits)

Parameters

bits − This is any long integer.

Return Value

This method returns the double floating-point value with the same bit pattern.

Exception

NA

Getting Double from long Example

The following example shows the usage of Double longBitsToDouble() method to get a double value from a given bit representation. We've printed three double values based on given bit representations.

package com.tutorialspoint;

public class DoubleDemo {
   public static void main(String[] args) {
  
      /* returns the double value corresponding to a given bit representation */
      System.out.println(Double.longBitsToDouble(6757689L));
      System.out.println(Double.longBitsToDouble(0x7ff0000000000000L));  
      System.out.println(Double.longBitsToDouble(0xfff0000000000000L));  
   }
}

Output

Let us compile and run the above program, this will produce the following result −

3.338742E-317
Infinity
-Infinity

Getting Double from Positive long Example

The following example shows another usage of Double longBitsToDouble() method to get a double value from a given bit representation. We've printed a double value based on given bit representation.

package com.tutorialspoint;
public class DoubleDemo {
   public static void main(String[] args) {
  
      /* returns the double value corresponding to a given bit representation */
      System.out.println(Double.longBitsToDouble(4624802752342104474L)); 
   }
}

Output

Let us compile and run the above program, this will produce the following result −

15.3

Getting Double from Negative long Example

The following example shows the usage of Double longBitsToDouble() method to get a double value from a given bit representation. We've printed a double value based on given bit representation.

package com.tutorialspoint;
public class DoubleDemo {
   public static void main(String[] args) {
  
      /* returns the double value corresponding to a given bit representation */
      System.out.println(Double.longBitsToDouble(-4598569284512671334L)); 
   }
}

Output

Let us compile and run the above program, this will produce the following result −

-15.3
java_lang_double.htm
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