diff -r cc0d42d2110a -r 05224402145d emul/mini/src/main/java/java/lang/Short.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/emul/mini/src/main/java/java/lang/Short.java Wed Jan 23 20:39:23 2013 +0100 @@ -0,0 +1,468 @@ +/* + * Copyright (c) 1996, 2009, 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}. + * + *

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 JDK1.1 + */ +public final class Short extends Number implements Comparable { + + /** + * A constant holding the minimum value a {@code short} can + * have, -215. + */ + public static final short MIN_VALUE = -32768; + + /** + * A constant holding the maximum value a {@code short} can + * have, 215-1. + */ + public static final short MAX_VALUE = 32767; + + /** + * The {@code Class} instance representing the primitive type + * {@code short}. + */ + public static final Class TYPE = (Class) 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 '-'} + * ('\u002D') to indicate a negative value or an + * ASCII plus sign {@code '+'} ('\u002B') to + * indicate a positive value. The resulting {@code short} value + * is returned. + * + *

An exception of type {@code NumberFormatException} is + * thrown if any of the following situations occurs: + *

+ * + * @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 '-'} ('\u002D') to indicate a + * negative value or an ASCII plus sign {@code '+'} + * ('\u002B') 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. + * + *

In other words, this method returns a {@code Short} object + * equal to the value of: + * + *

+ * {@code new Short(Short.parseShort(s, radix))} + *
+ * + * @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. + * + *

In other words, this method returns a {@code Short} object + * equal to the value of: + * + *

+ * {@code new Short(Short.parseShort(s))} + *
+ * + * @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: + * + *
+ *
+ *
DecodableString: + *
Signopt DecimalNumeral + *
Signopt {@code 0x} HexDigits + *
Signopt {@code 0X} HexDigits + *
Signopt {@code #} HexDigits + *
Signopt {@code 0} OctalDigits + *

+ *

Sign: + *
{@code -} + *
{@code +} + *
+ *
+ * + * DecimalNumeral, HexDigits, and OctalDigits + * are as defined in section 3.10.1 of + * The Java™ Language Specification, + * except that underscores are not accepted between digits. + * + *

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}. + */ + 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}. + */ + public int intValue() { + return (int)value; + } + + /** + * Returns the value of this {@code Short} as a + * {@code long}. + */ + public long longValue() { + return (long)value; + } + + /** + * Returns the value of this {@code Short} as a + * {@code float}. + */ + public float floatValue() { + return (float)value; + } + + /** + * Returns the value of this {@code Short} as a + * {@code double}. + */ + 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} + */ + public int hashCode() { + 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: + * 

+     *    Short.valueOf(x).compareTo(Short.valueOf(y))
+     *
+ * + * @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; + + /** + * Returns the value obtained by reversing the order of the bytes in the + * two's complement representation of the specified {@code short} value. + * + * @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)); + } + + /** use serialVersionUID from JDK 1.1. for interoperability */ + private static final long serialVersionUID = 7515723908773894738L; +}