Java Float to Bit floatToIntBits(final float f)

Description

Returns the representation of the specified floating-point value according to the IEEE 754 floating-point "single format" bit layout, after first mapping -0.0 to 0.0.

License

Open Source License

Parameter

Parameter	Description
f	an input floating-point number

Return

the integer bits representing that floating-point number, after first mapping -0.0f to 0.0f

Declaration

public static final int floatToIntBits(final float f)

Method Source Code

//package com.java2s;

public class Main {
    /**/*  w  w  w. j a  v a 2s .  c o m*/
     * Returns the representation of the specified floating-point
     * value according to the IEEE 754 floating-point "single format"
     * bit layout, after first mapping -0.0 to 0.0. This method is
     * identical to Float.floatToIntBits(float) except that an integer
     * value of 0 is returned for a floating-point value of
     * -0.0f. This is done for the purpose of computing a hash code
     * that satisfies the contract of hashCode() and equals(). The
     * equals() method in each vecmath class does a pair-wise "=="
     * test on each floating-point field in the class (e.g., x, y, and
     * z for a Tuple3f). Since 0.0f&nbsp;==&nbsp;-0.0f returns true,
     * we must also return the same hash code for two objects, one of
     * which has a field with a value of -0.0f and the other of which
     * has a cooresponding field with a value of 0.0f.
     *
     * @param f an input floating-point number
     * @return the integer bits representing that floating-point
     * number, after first mapping -0.0f to 0.0f
     */
    public static final int floatToIntBits(final float f) {
        // Check for +0 or -0
        return ((f == 0.0f) ? 0 : Float.floatToIntBits(f));
    }
}