1.1 --- a/emul/mini/src/main/java/java/lang/Byte.java Fri Mar 22 16:59:47 2013 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,452 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 1996, 2009, Oracle and/or its affiliates. All rights reserved.
1.6 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 - *
1.8 - * This code is free software; you can redistribute it and/or modify it
1.9 - * under the terms of the GNU General Public License version 2 only, as
1.10 - * published by the Free Software Foundation. Oracle designates this
1.11 - * particular file as subject to the "Classpath" exception as provided
1.12 - * by Oracle in the LICENSE file that accompanied this code.
1.13 - *
1.14 - * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 - * version 2 for more details (a copy is included in the LICENSE file that
1.18 - * accompanied this code).
1.19 - *
1.20 - * You should have received a copy of the GNU General Public License version
1.21 - * 2 along with this work; if not, write to the Free Software Foundation,
1.22 - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 - *
1.24 - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 - * or visit www.oracle.com if you need additional information or have any
1.26 - * questions.
1.27 - */
1.28 -
1.29 -package java.lang;
1.30 -
1.31 -/**
1.32 - *
1.33 - * The {@code Byte} class wraps a value of primitive type {@code byte}
1.34 - * in an object. An object of type {@code Byte} contains a single
1.35 - * field whose type is {@code byte}.
1.36 - *
1.37 - * <p>In addition, this class provides several methods for converting
1.38 - * a {@code byte} to a {@code String} and a {@code String} to a {@code
1.39 - * byte}, as well as other constants and methods useful when dealing
1.40 - * with a {@code byte}.
1.41 - *
1.42 - * @author Nakul Saraiya
1.43 - * @author Joseph D. Darcy
1.44 - * @see java.lang.Number
1.45 - * @since JDK1.1
1.46 - */
1.47 -public final class Byte extends Number implements Comparable<Byte> {
1.48 -
1.49 - /**
1.50 - * A constant holding the minimum value a {@code byte} can
1.51 - * have, -2<sup>7</sup>.
1.52 - */
1.53 - public static final byte MIN_VALUE = -128;
1.54 -
1.55 - /**
1.56 - * A constant holding the maximum value a {@code byte} can
1.57 - * have, 2<sup>7</sup>-1.
1.58 - */
1.59 - public static final byte MAX_VALUE = 127;
1.60 -
1.61 - /**
1.62 - * The {@code Class} instance representing the primitive type
1.63 - * {@code byte}.
1.64 - */
1.65 - public static final Class<Byte> TYPE = (Class<Byte>) Class.getPrimitiveClass("byte");
1.66 -
1.67 - /**
1.68 - * Returns a new {@code String} object representing the
1.69 - * specified {@code byte}. The radix is assumed to be 10.
1.70 - *
1.71 - * @param b the {@code byte} to be converted
1.72 - * @return the string representation of the specified {@code byte}
1.73 - * @see java.lang.Integer#toString(int)
1.74 - */
1.75 - public static String toString(byte b) {
1.76 - return Integer.toString((int)b, 10);
1.77 - }
1.78 -
1.79 - private static class ByteCache {
1.80 - private ByteCache(){}
1.81 -
1.82 - static final Byte cache[] = new Byte[-(-128) + 127 + 1];
1.83 -
1.84 - static {
1.85 - for(int i = 0; i < cache.length; i++)
1.86 - cache[i] = new Byte((byte)(i - 128));
1.87 - }
1.88 - }
1.89 -
1.90 - /**
1.91 - * Returns a {@code Byte} instance representing the specified
1.92 - * {@code byte} value.
1.93 - * If a new {@code Byte} instance is not required, this method
1.94 - * should generally be used in preference to the constructor
1.95 - * {@link #Byte(byte)}, as this method is likely to yield
1.96 - * significantly better space and time performance since
1.97 - * all byte values are cached.
1.98 - *
1.99 - * @param b a byte value.
1.100 - * @return a {@code Byte} instance representing {@code b}.
1.101 - * @since 1.5
1.102 - */
1.103 - public static Byte valueOf(byte b) {
1.104 - final int offset = 128;
1.105 - return ByteCache.cache[(int)b + offset];
1.106 - }
1.107 -
1.108 - /**
1.109 - * Parses the string argument as a signed {@code byte} in the
1.110 - * radix specified by the second argument. The characters in the
1.111 - * string must all be digits, of the specified radix (as
1.112 - * determined by whether {@link java.lang.Character#digit(char,
1.113 - * int)} returns a nonnegative value) except that the first
1.114 - * character may be an ASCII minus sign {@code '-'}
1.115 - * (<code>'\u002D'</code>) to indicate a negative value or an
1.116 - * ASCII plus sign {@code '+'} (<code>'\u002B'</code>) to
1.117 - * indicate a positive value. The resulting {@code byte} value is
1.118 - * returned.
1.119 - *
1.120 - * <p>An exception of type {@code NumberFormatException} is
1.121 - * thrown if any of the following situations occurs:
1.122 - * <ul>
1.123 - * <li> The first argument is {@code null} or is a string of
1.124 - * length zero.
1.125 - *
1.126 - * <li> The radix is either smaller than {@link
1.127 - * java.lang.Character#MIN_RADIX} or larger than {@link
1.128 - * java.lang.Character#MAX_RADIX}.
1.129 - *
1.130 - * <li> Any character of the string is not a digit of the
1.131 - * specified radix, except that the first character may be a minus
1.132 - * sign {@code '-'} (<code>'\u002D'</code>) or plus sign
1.133 - * {@code '+'} (<code>'\u002B'</code>) provided that the
1.134 - * string is longer than length 1.
1.135 - *
1.136 - * <li> The value represented by the string is not a value of type
1.137 - * {@code byte}.
1.138 - * </ul>
1.139 - *
1.140 - * @param s the {@code String} containing the
1.141 - * {@code byte}
1.142 - * representation to be parsed
1.143 - * @param radix the radix to be used while parsing {@code s}
1.144 - * @return the {@code byte} value represented by the string
1.145 - * argument in the specified radix
1.146 - * @throws NumberFormatException If the string does
1.147 - * not contain a parsable {@code byte}.
1.148 - */
1.149 - public static byte parseByte(String s, int radix)
1.150 - throws NumberFormatException {
1.151 - int i = Integer.parseInt(s, radix);
1.152 - if (i < MIN_VALUE || i > MAX_VALUE)
1.153 - throw new NumberFormatException(
1.154 - "Value out of range. Value:\"" + s + "\" Radix:" + radix);
1.155 - return (byte)i;
1.156 - }
1.157 -
1.158 - /**
1.159 - * Parses the string argument as a signed decimal {@code
1.160 - * byte}. The characters in the string must all be decimal digits,
1.161 - * except that the first character may be an ASCII minus sign
1.162 - * {@code '-'} (<code>'\u002D'</code>) to indicate a negative
1.163 - * value or an ASCII plus sign {@code '+'}
1.164 - * (<code>'\u002B'</code>) to indicate a positive value. The
1.165 - * resulting {@code byte} value is returned, exactly as if the
1.166 - * argument and the radix 10 were given as arguments to the {@link
1.167 - * #parseByte(java.lang.String, int)} method.
1.168 - *
1.169 - * @param s a {@code String} containing the
1.170 - * {@code byte} representation to be parsed
1.171 - * @return the {@code byte} value represented by the
1.172 - * argument in decimal
1.173 - * @throws NumberFormatException if the string does not
1.174 - * contain a parsable {@code byte}.
1.175 - */
1.176 - public static byte parseByte(String s) throws NumberFormatException {
1.177 - return parseByte(s, 10);
1.178 - }
1.179 -
1.180 - /**
1.181 - * Returns a {@code Byte} object holding the value
1.182 - * extracted from the specified {@code String} when parsed
1.183 - * with the radix given by the second argument. The first argument
1.184 - * is interpreted as representing a signed {@code byte} in
1.185 - * the radix specified by the second argument, exactly as if the
1.186 - * argument were given to the {@link #parseByte(java.lang.String,
1.187 - * int)} method. The result is a {@code Byte} object that
1.188 - * represents the {@code byte} value specified by the string.
1.189 - *
1.190 - * <p> In other words, this method returns a {@code Byte} object
1.191 - * equal to the value of:
1.192 - *
1.193 - * <blockquote>
1.194 - * {@code new Byte(Byte.parseByte(s, radix))}
1.195 - * </blockquote>
1.196 - *
1.197 - * @param s the string to be parsed
1.198 - * @param radix the radix to be used in interpreting {@code s}
1.199 - * @return a {@code Byte} object holding the value
1.200 - * represented by the string argument in the
1.201 - * specified radix.
1.202 - * @throws NumberFormatException If the {@code String} does
1.203 - * not contain a parsable {@code byte}.
1.204 - */
1.205 - public static Byte valueOf(String s, int radix)
1.206 - throws NumberFormatException {
1.207 - return valueOf(parseByte(s, radix));
1.208 - }
1.209 -
1.210 - /**
1.211 - * Returns a {@code Byte} object holding the value
1.212 - * given by the specified {@code String}. The argument is
1.213 - * interpreted as representing a signed decimal {@code byte},
1.214 - * exactly as if the argument were given to the {@link
1.215 - * #parseByte(java.lang.String)} method. The result is a
1.216 - * {@code Byte} object that represents the {@code byte}
1.217 - * value specified by the string.
1.218 - *
1.219 - * <p> In other words, this method returns a {@code Byte} object
1.220 - * equal to the value of:
1.221 - *
1.222 - * <blockquote>
1.223 - * {@code new Byte(Byte.parseByte(s))}
1.224 - * </blockquote>
1.225 - *
1.226 - * @param s the string to be parsed
1.227 - * @return a {@code Byte} object holding the value
1.228 - * represented by the string argument
1.229 - * @throws NumberFormatException If the {@code String} does
1.230 - * not contain a parsable {@code byte}.
1.231 - */
1.232 - public static Byte valueOf(String s) throws NumberFormatException {
1.233 - return valueOf(s, 10);
1.234 - }
1.235 -
1.236 - /**
1.237 - * Decodes a {@code String} into a {@code Byte}.
1.238 - * Accepts decimal, hexadecimal, and octal numbers given by
1.239 - * the following grammar:
1.240 - *
1.241 - * <blockquote>
1.242 - * <dl>
1.243 - * <dt><i>DecodableString:</i>
1.244 - * <dd><i>Sign<sub>opt</sub> DecimalNumeral</i>
1.245 - * <dd><i>Sign<sub>opt</sub></i> {@code 0x} <i>HexDigits</i>
1.246 - * <dd><i>Sign<sub>opt</sub></i> {@code 0X} <i>HexDigits</i>
1.247 - * <dd><i>Sign<sub>opt</sub></i> {@code #} <i>HexDigits</i>
1.248 - * <dd><i>Sign<sub>opt</sub></i> {@code 0} <i>OctalDigits</i>
1.249 - * <p>
1.250 - * <dt><i>Sign:</i>
1.251 - * <dd>{@code -}
1.252 - * <dd>{@code +}
1.253 - * </dl>
1.254 - * </blockquote>
1.255 - *
1.256 - * <i>DecimalNumeral</i>, <i>HexDigits</i>, and <i>OctalDigits</i>
1.257 - * are as defined in section 3.10.1 of
1.258 - * <cite>The Java™ Language Specification</cite>,
1.259 - * except that underscores are not accepted between digits.
1.260 - *
1.261 - * <p>The sequence of characters following an optional
1.262 - * sign and/or radix specifier ("{@code 0x}", "{@code 0X}",
1.263 - * "{@code #}", or leading zero) is parsed as by the {@code
1.264 - * Byte.parseByte} method with the indicated radix (10, 16, or 8).
1.265 - * This sequence of characters must represent a positive value or
1.266 - * a {@link NumberFormatException} will be thrown. The result is
1.267 - * negated if first character of the specified {@code String} is
1.268 - * the minus sign. No whitespace characters are permitted in the
1.269 - * {@code String}.
1.270 - *
1.271 - * @param nm the {@code String} to decode.
1.272 - * @return a {@code Byte} object holding the {@code byte}
1.273 - * value represented by {@code nm}
1.274 - * @throws NumberFormatException if the {@code String} does not
1.275 - * contain a parsable {@code byte}.
1.276 - * @see java.lang.Byte#parseByte(java.lang.String, int)
1.277 - */
1.278 - public static Byte decode(String nm) throws NumberFormatException {
1.279 - int i = Integer.decode(nm);
1.280 - if (i < MIN_VALUE || i > MAX_VALUE)
1.281 - throw new NumberFormatException(
1.282 - "Value " + i + " out of range from input " + nm);
1.283 - return valueOf((byte)i);
1.284 - }
1.285 -
1.286 - /**
1.287 - * The value of the {@code Byte}.
1.288 - *
1.289 - * @serial
1.290 - */
1.291 - private final byte value;
1.292 -
1.293 - /**
1.294 - * Constructs a newly allocated {@code Byte} object that
1.295 - * represents the specified {@code byte} value.
1.296 - *
1.297 - * @param value the value to be represented by the
1.298 - * {@code Byte}.
1.299 - */
1.300 - public Byte(byte value) {
1.301 - this.value = value;
1.302 - }
1.303 -
1.304 - /**
1.305 - * Constructs a newly allocated {@code Byte} object that
1.306 - * represents the {@code byte} value indicated by the
1.307 - * {@code String} parameter. The string is converted to a
1.308 - * {@code byte} value in exactly the manner used by the
1.309 - * {@code parseByte} method for radix 10.
1.310 - *
1.311 - * @param s the {@code String} to be converted to a
1.312 - * {@code Byte}
1.313 - * @throws NumberFormatException If the {@code String}
1.314 - * does not contain a parsable {@code byte}.
1.315 - * @see java.lang.Byte#parseByte(java.lang.String, int)
1.316 - */
1.317 - public Byte(String s) throws NumberFormatException {
1.318 - this.value = parseByte(s, 10);
1.319 - }
1.320 -
1.321 - /**
1.322 - * Returns the value of this {@code Byte} as a
1.323 - * {@code byte}.
1.324 - */
1.325 - public byte byteValue() {
1.326 - return value;
1.327 - }
1.328 -
1.329 - /**
1.330 - * Returns the value of this {@code Byte} as a
1.331 - * {@code short}.
1.332 - */
1.333 - public short shortValue() {
1.334 - return (short)value;
1.335 - }
1.336 -
1.337 - /**
1.338 - * Returns the value of this {@code Byte} as an
1.339 - * {@code int}.
1.340 - */
1.341 - public int intValue() {
1.342 - return (int)value;
1.343 - }
1.344 -
1.345 - /**
1.346 - * Returns the value of this {@code Byte} as a
1.347 - * {@code long}.
1.348 - */
1.349 - public long longValue() {
1.350 - return (long)value;
1.351 - }
1.352 -
1.353 - /**
1.354 - * Returns the value of this {@code Byte} as a
1.355 - * {@code float}.
1.356 - */
1.357 - public float floatValue() {
1.358 - return (float)value;
1.359 - }
1.360 -
1.361 - /**
1.362 - * Returns the value of this {@code Byte} as a
1.363 - * {@code double}.
1.364 - */
1.365 - public double doubleValue() {
1.366 - return (double)value;
1.367 - }
1.368 -
1.369 - /**
1.370 - * Returns a {@code String} object representing this
1.371 - * {@code Byte}'s value. The value is converted to signed
1.372 - * decimal representation and returned as a string, exactly as if
1.373 - * the {@code byte} value were given as an argument to the
1.374 - * {@link java.lang.Byte#toString(byte)} method.
1.375 - *
1.376 - * @return a string representation of the value of this object in
1.377 - * base 10.
1.378 - */
1.379 - public String toString() {
1.380 - return Integer.toString((int)value);
1.381 - }
1.382 -
1.383 - /**
1.384 - * Returns a hash code for this {@code Byte}; equal to the result
1.385 - * of invoking {@code intValue()}.
1.386 - *
1.387 - * @return a hash code value for this {@code Byte}
1.388 - */
1.389 - public int hashCode() {
1.390 - return (int)value;
1.391 - }
1.392 -
1.393 - /**
1.394 - * Compares this object to the specified object. The result is
1.395 - * {@code true} if and only if the argument is not
1.396 - * {@code null} and is a {@code Byte} object that
1.397 - * contains the same {@code byte} value as this object.
1.398 - *
1.399 - * @param obj the object to compare with
1.400 - * @return {@code true} if the objects are the same;
1.401 - * {@code false} otherwise.
1.402 - */
1.403 - public boolean equals(Object obj) {
1.404 - if (obj instanceof Byte) {
1.405 - return value == ((Byte)obj).byteValue();
1.406 - }
1.407 - return false;
1.408 - }
1.409 -
1.410 - /**
1.411 - * Compares two {@code Byte} objects numerically.
1.412 - *
1.413 - * @param anotherByte the {@code Byte} to be compared.
1.414 - * @return the value {@code 0} if this {@code Byte} is
1.415 - * equal to the argument {@code Byte}; a value less than
1.416 - * {@code 0} if this {@code Byte} is numerically less
1.417 - * than the argument {@code Byte}; and a value greater than
1.418 - * {@code 0} if this {@code Byte} is numerically
1.419 - * greater than the argument {@code Byte} (signed
1.420 - * comparison).
1.421 - * @since 1.2
1.422 - */
1.423 - public int compareTo(Byte anotherByte) {
1.424 - return compare(this.value, anotherByte.value);
1.425 - }
1.426 -
1.427 - /**
1.428 - * Compares two {@code byte} values numerically.
1.429 - * The value returned is identical to what would be returned by:
1.430 - * <pre>
1.431 - * Byte.valueOf(x).compareTo(Byte.valueOf(y))
1.432 - * </pre>
1.433 - *
1.434 - * @param x the first {@code byte} to compare
1.435 - * @param y the second {@code byte} to compare
1.436 - * @return the value {@code 0} if {@code x == y};
1.437 - * a value less than {@code 0} if {@code x < y}; and
1.438 - * a value greater than {@code 0} if {@code x > y}
1.439 - * @since 1.7
1.440 - */
1.441 - public static int compare(byte x, byte y) {
1.442 - return x - y;
1.443 - }
1.444 -
1.445 - /**
1.446 - * The number of bits used to represent a {@code byte} value in two's
1.447 - * complement binary form.
1.448 - *
1.449 - * @since 1.5
1.450 - */
1.451 - public static final int SIZE = 8;
1.452 -
1.453 - /** use serialVersionUID from JDK 1.1. for interoperability */
1.454 - private static final long serialVersionUID = -7183698231559129828L;
1.455 -}