--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/lang/Short.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,537 @@
+/*
+ * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.lang;
+
+/**
+ * The {@code Short} class wraps a value of primitive type {@code
+ * short} in an object. An object of type {@code Short} contains a
+ * single field whose type is {@code short}.
+ *
+ * <p>In addition, this class provides several methods for converting
+ * a {@code short} to a {@code String} and a {@code String} to a
+ * {@code short}, as well as other constants and methods useful when
+ * dealing with a {@code short}.
+ *
+ * @author Nakul Saraiya
+ * @author Joseph D. Darcy
+ * @see java.lang.Number
+ * @since 1.1
+ */
+public final class Short extends Number implements Comparable<Short> {
+
+ /**
+ * A constant holding the minimum value a {@code short} can
+ * have, -2<sup>15</sup>.
+ */
+ public static final short MIN_VALUE = -32768;
+
+ /**
+ * A constant holding the maximum value a {@code short} can
+ * have, 2<sup>15</sup>-1.
+ */
+ public static final short MAX_VALUE = 32767;
+
+ /**
+ * The {@code Class} instance representing the primitive type
+ * {@code short}.
+ */
+ @SuppressWarnings("unchecked")
+ public static final Class<Short> TYPE = (Class<Short>) Class.getPrimitiveClass("short");
+
+ /**
+ * Returns a new {@code String} object representing the
+ * specified {@code short}. The radix is assumed to be 10.
+ *
+ * @param s the {@code short} to be converted
+ * @return the string representation of the specified {@code short}
+ * @see java.lang.Integer#toString(int)
+ */
+ public static String toString(short s) {
+ return Integer.toString((int)s, 10);
+ }
+
+ /**
+ * Parses the string argument as a signed {@code short} in the
+ * radix specified by the second argument. The characters in the
+ * string must all be digits, of the specified radix (as
+ * determined by whether {@link java.lang.Character#digit(char,
+ * int)} returns a nonnegative value) except that the first
+ * character may be an ASCII minus sign {@code '-'}
+ * ({@code '\u005Cu002D'}) to indicate a negative value or an
+ * ASCII plus sign {@code '+'} ({@code '\u005Cu002B'}) to
+ * indicate a positive value. The resulting {@code short} value
+ * is returned.
+ *
+ * <p>An exception of type {@code NumberFormatException} is
+ * thrown if any of the following situations occurs:
+ * <ul>
+ * <li> The first argument is {@code null} or is a string of
+ * length zero.
+ *
+ * <li> The radix is either smaller than {@link
+ * java.lang.Character#MIN_RADIX} or larger than {@link
+ * java.lang.Character#MAX_RADIX}.
+ *
+ * <li> Any character of the string is not a digit of the
+ * specified radix, except that the first character may be a minus
+ * sign {@code '-'} ({@code '\u005Cu002D'}) or plus sign
+ * {@code '+'} ({@code '\u005Cu002B'}) provided that the
+ * string is longer than length 1.
+ *
+ * <li> The value represented by the string is not a value of type
+ * {@code short}.
+ * </ul>
+ *
+ * @param s the {@code String} containing the
+ * {@code short} representation to be parsed
+ * @param radix the radix to be used while parsing {@code s}
+ * @return the {@code short} represented by the string
+ * argument in the specified radix.
+ * @throws NumberFormatException If the {@code String}
+ * does not contain a parsable {@code short}.
+ */
+ public static short parseShort(String s, int radix)
+ throws NumberFormatException {
+ int i = Integer.parseInt(s, radix);
+ if (i < MIN_VALUE || i > MAX_VALUE)
+ throw new NumberFormatException(
+ "Value out of range. Value:\"" + s + "\" Radix:" + radix);
+ return (short)i;
+ }
+
+ /**
+ * Parses the string argument as a signed decimal {@code
+ * short}. The characters in the string must all be decimal
+ * digits, except that the first character may be an ASCII minus
+ * sign {@code '-'} ({@code '\u005Cu002D'}) to indicate a
+ * negative value or an ASCII plus sign {@code '+'}
+ * ({@code '\u005Cu002B'}) to indicate a positive value. The
+ * resulting {@code short} value is returned, exactly as if the
+ * argument and the radix 10 were given as arguments to the {@link
+ * #parseShort(java.lang.String, int)} method.
+ *
+ * @param s a {@code String} containing the {@code short}
+ * representation to be parsed
+ * @return the {@code short} value represented by the
+ * argument in decimal.
+ * @throws NumberFormatException If the string does not
+ * contain a parsable {@code short}.
+ */
+ public static short parseShort(String s) throws NumberFormatException {
+ return parseShort(s, 10);
+ }
+
+ /**
+ * Returns a {@code Short} object holding the value
+ * extracted from the specified {@code String} when parsed
+ * with the radix given by the second argument. The first argument
+ * is interpreted as representing a signed {@code short} in
+ * the radix specified by the second argument, exactly as if the
+ * argument were given to the {@link #parseShort(java.lang.String,
+ * int)} method. The result is a {@code Short} object that
+ * represents the {@code short} value specified by the string.
+ *
+ * <p>In other words, this method returns a {@code Short} object
+ * equal to the value of:
+ *
+ * <blockquote>
+ * {@code new Short(Short.parseShort(s, radix))}
+ * </blockquote>
+ *
+ * @param s the string to be parsed
+ * @param radix the radix to be used in interpreting {@code s}
+ * @return a {@code Short} object holding the value
+ * represented by the string argument in the
+ * specified radix.
+ * @throws NumberFormatException If the {@code String} does
+ * not contain a parsable {@code short}.
+ */
+ public static Short valueOf(String s, int radix)
+ throws NumberFormatException {
+ return valueOf(parseShort(s, radix));
+ }
+
+ /**
+ * Returns a {@code Short} object holding the
+ * value given by the specified {@code String}. The argument
+ * is interpreted as representing a signed decimal
+ * {@code short}, exactly as if the argument were given to
+ * the {@link #parseShort(java.lang.String)} method. The result is
+ * a {@code Short} object that represents the
+ * {@code short} value specified by the string.
+ *
+ * <p>In other words, this method returns a {@code Short} object
+ * equal to the value of:
+ *
+ * <blockquote>
+ * {@code new Short(Short.parseShort(s))}
+ * </blockquote>
+ *
+ * @param s the string to be parsed
+ * @return a {@code Short} object holding the value
+ * represented by the string argument
+ * @throws NumberFormatException If the {@code String} does
+ * not contain a parsable {@code short}.
+ */
+ public static Short valueOf(String s) throws NumberFormatException {
+ return valueOf(s, 10);
+ }
+
+ private static class ShortCache {
+ private ShortCache(){}
+
+ static final Short cache[] = new Short[-(-128) + 127 + 1];
+
+ static {
+ for(int i = 0; i < cache.length; i++)
+ cache[i] = new Short((short)(i - 128));
+ }
+ }
+
+ /**
+ * Returns a {@code Short} instance representing the specified
+ * {@code short} value.
+ * If a new {@code Short} instance is not required, this method
+ * should generally be used in preference to the constructor
+ * {@link #Short(short)}, as this method is likely to yield
+ * significantly better space and time performance by caching
+ * frequently requested values.
+ *
+ * This method will always cache values in the range -128 to 127,
+ * inclusive, and may cache other values outside of this range.
+ *
+ * @param s a short value.
+ * @return a {@code Short} instance representing {@code s}.
+ * @since 1.5
+ */
+ public static Short valueOf(short s) {
+ final int offset = 128;
+ int sAsInt = s;
+ if (sAsInt >= -128 && sAsInt <= 127) { // must cache
+ return ShortCache.cache[sAsInt + offset];
+ }
+ return new Short(s);
+ }
+
+ /**
+ * Decodes a {@code String} into a {@code Short}.
+ * Accepts decimal, hexadecimal, and octal numbers given by
+ * the following grammar:
+ *
+ * <blockquote>
+ * <dl>
+ * <dt><i>DecodableString:</i>
+ * <dd><i>Sign<sub>opt</sub> DecimalNumeral</i>
+ * <dd><i>Sign<sub>opt</sub></i> {@code 0x} <i>HexDigits</i>
+ * <dd><i>Sign<sub>opt</sub></i> {@code 0X} <i>HexDigits</i>
+ * <dd><i>Sign<sub>opt</sub></i> {@code #} <i>HexDigits</i>
+ * <dd><i>Sign<sub>opt</sub></i> {@code 0} <i>OctalDigits</i>
+ *
+ * <dt><i>Sign:</i>
+ * <dd>{@code -}
+ * <dd>{@code +}
+ * </dl>
+ * </blockquote>
+ *
+ * <i>DecimalNumeral</i>, <i>HexDigits</i>, and <i>OctalDigits</i>
+ * are as defined in section 3.10.1 of
+ * <cite>The Java™ Language Specification</cite>,
+ * except that underscores are not accepted between digits.
+ *
+ * <p>The sequence of characters following an optional
+ * sign and/or radix specifier ("{@code 0x}", "{@code 0X}",
+ * "{@code #}", or leading zero) is parsed as by the {@code
+ * Short.parseShort} method with the indicated radix (10, 16, or
+ * 8). This sequence of characters must represent a positive
+ * value or a {@link NumberFormatException} will be thrown. The
+ * result is negated if first character of the specified {@code
+ * String} is the minus sign. No whitespace characters are
+ * permitted in the {@code String}.
+ *
+ * @param nm the {@code String} to decode.
+ * @return a {@code Short} object holding the {@code short}
+ * value represented by {@code nm}
+ * @throws NumberFormatException if the {@code String} does not
+ * contain a parsable {@code short}.
+ * @see java.lang.Short#parseShort(java.lang.String, int)
+ */
+ public static Short decode(String nm) throws NumberFormatException {
+ int i = Integer.decode(nm);
+ if (i < MIN_VALUE || i > MAX_VALUE)
+ throw new NumberFormatException(
+ "Value " + i + " out of range from input " + nm);
+ return valueOf((short)i);
+ }
+
+ /**
+ * The value of the {@code Short}.
+ *
+ * @serial
+ */
+ private final short value;
+
+ /**
+ * Constructs a newly allocated {@code Short} object that
+ * represents the specified {@code short} value.
+ *
+ * @param value the value to be represented by the
+ * {@code Short}.
+ */
+ public Short(short value) {
+ this.value = value;
+ }
+
+ /**
+ * Constructs a newly allocated {@code Short} object that
+ * represents the {@code short} value indicated by the
+ * {@code String} parameter. The string is converted to a
+ * {@code short} value in exactly the manner used by the
+ * {@code parseShort} method for radix 10.
+ *
+ * @param s the {@code String} to be converted to a
+ * {@code Short}
+ * @throws NumberFormatException If the {@code String}
+ * does not contain a parsable {@code short}.
+ * @see java.lang.Short#parseShort(java.lang.String, int)
+ */
+ public Short(String s) throws NumberFormatException {
+ this.value = parseShort(s, 10);
+ }
+
+ /**
+ * Returns the value of this {@code Short} as a {@code byte} after
+ * a narrowing primitive conversion.
+ * @jls 5.1.3 Narrowing Primitive Conversions
+ */
+ public byte byteValue() {
+ return (byte)value;
+ }
+
+ /**
+ * Returns the value of this {@code Short} as a
+ * {@code short}.
+ */
+ public short shortValue() {
+ return value;
+ }
+
+ /**
+ * Returns the value of this {@code Short} as an {@code int} after
+ * a widening primitive conversion.
+ * @jls 5.1.2 Widening Primitive Conversions
+ */
+ public int intValue() {
+ return (int)value;
+ }
+
+ /**
+ * Returns the value of this {@code Short} as a {@code long} after
+ * a widening primitive conversion.
+ * @jls 5.1.2 Widening Primitive Conversions
+ */
+ public long longValue() {
+ return (long)value;
+ }
+
+ /**
+ * Returns the value of this {@code Short} as a {@code float}
+ * after a widening primitive conversion.
+ * @jls 5.1.2 Widening Primitive Conversions
+ */
+ public float floatValue() {
+ return (float)value;
+ }
+
+ /**
+ * Returns the value of this {@code Short} as a {@code double}
+ * after a widening primitive conversion.
+ * @jls 5.1.2 Widening Primitive Conversions
+ */
+ public double doubleValue() {
+ return (double)value;
+ }
+
+ /**
+ * Returns a {@code String} object representing this
+ * {@code Short}'s value. The value is converted to signed
+ * decimal representation and returned as a string, exactly as if
+ * the {@code short} value were given as an argument to the
+ * {@link java.lang.Short#toString(short)} method.
+ *
+ * @return a string representation of the value of this object in
+ * base 10.
+ */
+ public String toString() {
+ return Integer.toString((int)value);
+ }
+
+ /**
+ * Returns a hash code for this {@code Short}; equal to the result
+ * of invoking {@code intValue()}.
+ *
+ * @return a hash code value for this {@code Short}
+ */
+ @Override
+ public int hashCode() {
+ return Short.hashCode(value);
+ }
+
+ /**
+ * Returns a hash code for a {@code short} value; compatible with
+ * {@code Short.hashCode()}.
+ *
+ * @param value the value to hash
+ * @return a hash code value for a {@code short} value.
+ * @since 1.8
+ */
+ public static int hashCode(short value) {
+ return (int)value;
+ }
+
+ /**
+ * Compares this object to the specified object. The result is
+ * {@code true} if and only if the argument is not
+ * {@code null} and is a {@code Short} object that
+ * contains the same {@code short} value as this object.
+ *
+ * @param obj the object to compare with
+ * @return {@code true} if the objects are the same;
+ * {@code false} otherwise.
+ */
+ public boolean equals(Object obj) {
+ if (obj instanceof Short) {
+ return value == ((Short)obj).shortValue();
+ }
+ return false;
+ }
+
+ /**
+ * Compares two {@code Short} objects numerically.
+ *
+ * @param anotherShort the {@code Short} to be compared.
+ * @return the value {@code 0} if this {@code Short} is
+ * equal to the argument {@code Short}; a value less than
+ * {@code 0} if this {@code Short} is numerically less
+ * than the argument {@code Short}; and a value greater than
+ * {@code 0} if this {@code Short} is numerically
+ * greater than the argument {@code Short} (signed
+ * comparison).
+ * @since 1.2
+ */
+ public int compareTo(Short anotherShort) {
+ return compare(this.value, anotherShort.value);
+ }
+
+ /**
+ * Compares two {@code short} values numerically.
+ * The value returned is identical to what would be returned by:
+ * <pre>
+ * Short.valueOf(x).compareTo(Short.valueOf(y))
+ * </pre>
+ *
+ * @param x the first {@code short} to compare
+ * @param y the second {@code short} to compare
+ * @return the value {@code 0} if {@code x == y};
+ * a value less than {@code 0} if {@code x < y}; and
+ * a value greater than {@code 0} if {@code x > y}
+ * @since 1.7
+ */
+ public static int compare(short x, short y) {
+ return x - y;
+ }
+
+ /**
+ * The number of bits used to represent a {@code short} value in two's
+ * complement binary form.
+ * @since 1.5
+ */
+ public static final int SIZE = 16;
+
+ /**
+ * The number of bytes used to represent a {@code short} value in two's
+ * complement binary form.
+ *
+ * @since 1.8
+ */
+ public static final int BYTES = SIZE / Byte.SIZE;
+
+ /**
+ * Returns the value obtained by reversing the order of the bytes in the
+ * two's complement representation of the specified {@code short} value.
+ *
+ * @param i the value whose bytes are to be reversed
+ * @return the value obtained by reversing (or, equivalently, swapping)
+ * the bytes in the specified {@code short} value.
+ * @since 1.5
+ */
+ public static short reverseBytes(short i) {
+ return (short) (((i & 0xFF00) >> 8) | (i << 8));
+ }
+
+
+ /**
+ * Converts the argument to an {@code int} by an unsigned
+ * conversion. In an unsigned conversion to an {@code int}, the
+ * high-order 16 bits of the {@code int} are zero and the
+ * low-order 16 bits are equal to the bits of the {@code short} argument.
+ *
+ * Consequently, zero and positive {@code short} values are mapped
+ * to a numerically equal {@code int} value and negative {@code
+ * short} values are mapped to an {@code int} value equal to the
+ * input plus 2<sup>16</sup>.
+ *
+ * @param x the value to convert to an unsigned {@code int}
+ * @return the argument converted to {@code int} by an unsigned
+ * conversion
+ * @since 1.8
+ */
+ public static int toUnsignedInt(short x) {
+ return ((int) x) & 0xffff;
+ }
+
+ /**
+ * Converts the argument to a {@code long} by an unsigned
+ * conversion. In an unsigned conversion to a {@code long}, the
+ * high-order 48 bits of the {@code long} are zero and the
+ * low-order 16 bits are equal to the bits of the {@code short} argument.
+ *
+ * Consequently, zero and positive {@code short} values are mapped
+ * to a numerically equal {@code long} value and negative {@code
+ * short} values are mapped to a {@code long} value equal to the
+ * input plus 2<sup>16</sup>.
+ *
+ * @param x the value to convert to an unsigned {@code long}
+ * @return the argument converted to {@code long} by an unsigned
+ * conversion
+ * @since 1.8
+ */
+ public static long toUnsignedLong(short x) {
+ return ((long) x) & 0xffffL;
+ }
+
+ /** use serialVersionUID from JDK 1.1. for interoperability */
+ private static final long serialVersionUID = 7515723908773894738L;
+}