java/lang/Float.java

32  * The {@code Float} class wraps a value of primitive type
34  * {@code Float} contains a single field whose type is
48 public final class Float extends Number implements Comparable<Float> {
52      * {@code Float.intBitsToFloat(0x7f800000)}.
59      * {@code Float.intBitsToFloat(0xff800000)}.
66      * {@code Float.intBitsToFloat(0x7fc00000)}.
75      * {@code Float.intBitsToFloat(0x7f7fffff)}.
83      * equal to {@code Float.intBitsToFloat(0x00800000)}.
93      * and also equal to {@code Float.intBitsToFloat(0x1)}.
100      * Math.getExponent(Float.MAX_VALUE)}.
109      * Math.getExponent(Float.MIN_NORMAL)}.
136     public static final Class<Float> TYPE = (Class<Float>) Class.getPrimitiveClass("float");
271      * <tr><td>{@code Float.MAX_VALUE}</td>
277      * <tr><td>{@code Float.MIN_VALUE}</td>
287         if (Math.abs(f) < Float.MIN_NORMAL
295                                                      Float.MIN_EXPONENT));
303      * Returns a {@code Float} object holding the
382      * Finally, after rounding a {@code Float} object representing
413      * @return  a {@code Float} object holding the value
418     public static Float valueOf(String s) throws NumberFormatException {
419         return new Float(parseFloat(s));
423      * Returns a {@code Float} instance representing the specified
425      * If a new {@code Float} instance is not required, this method
427      * {@link #Float(float)}, as this method is likely to yield
432      * @return a {@code Float} instance representing {@code f}.
436     public static Float valueOf(float f) {
437         return new Float(f);
443      * by the {@code valueOf} method of class {@code Float}.
451      * @see    java.lang.Float#valueOf(String)
494         return Math.abs(f) <= Float.MAX_VALUE;
498      * The value of the Float.
505      * Constructs a newly allocated {@code Float} object that
508      * @param   value   the value to be represented by the {@code Float}.
516     public Float(float value) {
521      * Constructs a newly allocated {@code Float} object that
524      * @param   value   the value to be represented by the {@code Float}.
529      * {@code Float.valueOf((float)value)}.
532     public Float(double value) {
537      * Constructs a newly allocated {@code Float} object that
542      * @param   s   a string to be converted to a {@code Float}.
550      * to convert a string to a {@code Float} object.
553     public Float(String s) throws NumberFormatException {
558      * Returns {@code true} if this {@code Float} value is a
569      * Returns {@code true} if this {@code Float} value is
581      * Returns a string representation of this {@code Float} object.
587      * @see java.lang.Float#toString(float)
590         return Float.toString(value);
594      * Returns the value of this {@code Float} as a {@code byte} after
606      * Returns the value of this {@code Float} as a {@code short}
619      * Returns the value of this {@code Float} as an {@code int} after
631      * Returns value of this {@code Float} as a {@code long} after a
643      * Returns the {@code float} value of this {@code Float} object.
653      * Returns the value of this {@code Float} as a {@code double}
665      * Returns a hash code for this {@code Float} object. The
668      * {@code float} value represented by this {@code Float}
675         return Float.hashCode(value);
680      * {@code Float.hashCode()}.
694      * {@code null} and is a {@code Float} object that
703      * {@code Float}, {@code f1} and {@code f2}, the value
713      *     {@code Float.NaN}, then the {@code equals} method returns
714      *     {@code true}, even though {@code Float.NaN==Float.NaN}
728      * @see java.lang.Float#floatToIntBits(float)
731         return (obj instanceof Float)
732                && (floatToIntBits(((Float)obj).value) == floatToIntBits(value));
832      * use of the {@code Float.floatToRawIntBits} method.
875      * Compares two {@code Float} objects numerically.  There are
882      *          {@code Float.NaN} is considered by this method to
885      *          (including {@code Float.POSITIVE_INFINITY}).
891      * This ensures that the <i>natural ordering</i> of {@code Float}
894      * @param   anotherFloat   the {@code Float} to be compared.
896      *          numerically equal to this {@code Float}; a value
897      *          less than {@code 0} if this {@code Float}
900      *          {@code Float} is numerically greater than
906     public int compareTo(Float anotherFloat) {
907         return Float.compare(value, anotherFloat.value);
915      *    new Float(f1).compareTo(new Float(f2))
935         int thisBits    = Float.floatToIntBits(f1);
936         int anotherBits = Float.floatToIntBits(f2);