Float floatToIntBits() method in Java with examples

The floatToIntBits() method in Float 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 “single format” bit layout.

Syntax:

public static int floatToIntBits(float val)

Parameter: The method accepts only one parameter val which specifies a floating-point number to be converted into integer bits.



Return Values: The function returns the integer bits that represent the floating-point number. Below are the special cases:

  • If the argument is positive infinity, the result is 0x7f800000.
  • If the argument is negative infinity, the result is 0xff800000.
  • If the argument is NaN, the result is 0x7fc00000.

Below programs illustrates the use of Float.floatToIntBits() method:

Program 1:

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// Java program to demonstrate
// Float.floatToIntBits() method
import java.lang.*;
  
class Gfg1 {
  
    public static void main(String args[])
    {
  
        float val = 1.5f;
  
        // function call
        int answer = Float.floatToIntBits(val);
  
        // print
        System.out.println(val + " in int bits: "
                           + answer);
    }
}

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Output:

1.5 in int bits: 1069547520

Program 2:

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// Java program to demonstrate
// Float.floatToIntBits() method
  
import java.lang.*;
  
class Gfg1 {
  
    public static void main(String args[])
    {
  
        float val = Float.POSITIVE_INFINITY;
        float val1 = Float.NEGATIVE_INFINITY;
        float val2 = Float.NaN;
  
        // function call
        int answer = Float.floatToIntBits(val);
  
        // print
        System.out.println(val + " in int bits: "
                           + answer);
  
        // function call
        answer = Float.floatToIntBits(val1);
  
        // print
        System.out.println(val1 + " in int bits: "
                           + answer);
  
        // function call
        answer = Float.floatToIntBits(val);
  
        // print
        System.out.println(val2 + " in int bits: "
                           + answer);
    }
}

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Output:

Infinity in int bits: 2139095040
-Infinity in int bits: -8388608
NaN in int bits: 2139095040

Reference: https://docs.oracle.com/javase/7/docs/api/java/lang/Float.html#floatToIntBits(float)



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