104 */
105 public static final int MAX_EXPONENT = 127;
106
107 /**
108 * Minimum exponent a normalized {@code float} variable may have.
109 * It is equal to the value returned by {@code
110 * Math.getExponent(Float.MIN_NORMAL)}.
111 *
112 * @since 1.6
113 */
114 public static final int MIN_EXPONENT = -126;
115
116 /**
117 * The number of bits used to represent a {@code float} value.
118 *
119 * @since 1.5
120 */
121 public static final int SIZE = 32;
122
123 /**
124 * The {@code Class} instance representing the primitive type
125 * {@code float}.
126 *
127 * @since JDK1.1
128 */
129 public static final Class<Float> TYPE = Class.getPrimitiveClass("float");
130
131 /**
132 * Returns a string representation of the {@code float}
133 * argument. All characters mentioned below are ASCII characters.
134 * <ul>
135 * <li>If the argument is NaN, the result is the string
136 * "{@code NaN}".
137 * <li>Otherwise, the result is a string that represents the sign and
138 * magnitude (absolute value) of the argument. If the sign is
139 * negative, the first character of the result is
140 * '{@code -}' (<code>'\u002D'</code>); if the sign is
141 * positive, no sign character appears in the result. As for
142 * the magnitude <i>m</i>:
143 * <ul>
617 * after a widening primitive conversion.
618 *
619 * @return the {@code float} value represented by this
620 * object converted to type {@code double}
621 * @jls 5.1.2 Widening Primitive Conversions
622 */
623 public double doubleValue() {
624 return (double)value;
625 }
626
627 /**
628 * Returns a hash code for this {@code Float} object. The
629 * result is the integer bit representation, exactly as produced
630 * by the method {@link #floatToIntBits(float)}, of the primitive
631 * {@code float} value represented by this {@code Float}
632 * object.
633 *
634 * @return a hash code value for this object.
635 */
636 public int hashCode() {
637 return floatToIntBits(value);
638 }
639
640 /**
641
642 * Compares this object against the specified object. The result
643 * is {@code true} if and only if the argument is not
644 * {@code null} and is a {@code Float} object that
645 * represents a {@code float} with the same value as the
646 * {@code float} represented by this object. For this
647 * purpose, two {@code float} values are considered to be the
648 * same if and only if the method {@link #floatToIntBits(float)}
649 * returns the identical {@code int} value when applied to
650 * each.
651 *
652 * <p>Note that in most cases, for two instances of class
653 * {@code Float}, {@code f1} and {@code f2}, the value
654 * of {@code f1.equals(f2)} is {@code true} if and only if
655 *
656 * <blockquote><pre>
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104 */
105 public static final int MAX_EXPONENT = 127;
106
107 /**
108 * Minimum exponent a normalized {@code float} variable may have.
109 * It is equal to the value returned by {@code
110 * Math.getExponent(Float.MIN_NORMAL)}.
111 *
112 * @since 1.6
113 */
114 public static final int MIN_EXPONENT = -126;
115
116 /**
117 * The number of bits used to represent a {@code float} value.
118 *
119 * @since 1.5
120 */
121 public static final int SIZE = 32;
122
123 /**
124 * The number of bytes used to represent a {@code float} value.
125 *
126 * @since 1.8
127 */
128 public static final int BYTES = SIZE / Byte.SIZE;
129
130 /**
131 * The {@code Class} instance representing the primitive type
132 * {@code float}.
133 *
134 * @since JDK1.1
135 */
136 public static final Class<Float> TYPE = Class.getPrimitiveClass("float");
137
138 /**
139 * Returns a string representation of the {@code float}
140 * argument. All characters mentioned below are ASCII characters.
141 * <ul>
142 * <li>If the argument is NaN, the result is the string
143 * "{@code NaN}".
144 * <li>Otherwise, the result is a string that represents the sign and
145 * magnitude (absolute value) of the argument. If the sign is
146 * negative, the first character of the result is
147 * '{@code -}' (<code>'\u002D'</code>); if the sign is
148 * positive, no sign character appears in the result. As for
149 * the magnitude <i>m</i>:
150 * <ul>
624 * after a widening primitive conversion.
625 *
626 * @return the {@code float} value represented by this
627 * object converted to type {@code double}
628 * @jls 5.1.2 Widening Primitive Conversions
629 */
630 public double doubleValue() {
631 return (double)value;
632 }
633
634 /**
635 * Returns a hash code for this {@code Float} object. The
636 * result is the integer bit representation, exactly as produced
637 * by the method {@link #floatToIntBits(float)}, of the primitive
638 * {@code float} value represented by this {@code Float}
639 * object.
640 *
641 * @return a hash code value for this object.
642 */
643 public int hashCode() {
644 return floatToIntBits(value);
645 }
646
647 /**
648 * Returns a hash code for a {@code float} value; compatible with
649 * {@code Float.hashCode()}.
650 *
651 * @since 1.8
652 *
653 * @return a hash code value for a {@code float} value.
654 */
655 public static int hashCode(float value) {
656 return floatToIntBits(value);
657 }
658
659 /**
660
661 * Compares this object against the specified object. The result
662 * is {@code true} if and only if the argument is not
663 * {@code null} and is a {@code Float} object that
664 * represents a {@code float} with the same value as the
665 * {@code float} represented by this object. For this
666 * purpose, two {@code float} values are considered to be the
667 * same if and only if the method {@link #floatToIntBits(float)}
668 * returns the identical {@code int} value when applied to
669 * each.
670 *
671 * <p>Note that in most cases, for two instances of class
672 * {@code Float}, {@code f1} and {@code f2}, the value
673 * of {@code f1.equals(f2)} is {@code true} if and only if
674 *
675 * <blockquote><pre>
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