From f911ba985aa7fe0096c386c5be385ac5825ea527 Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Sat, 16 Jul 2005 00:30:23 +0000 Subject: Initial revision From-SVN: r102074 --- libjava/classpath/java/lang/Short.java | 353 +++++++++++++++++++++++++++++++++ 1 file changed, 353 insertions(+) create mode 100644 libjava/classpath/java/lang/Short.java (limited to 'libjava/classpath/java/lang/Short.java') diff --git a/libjava/classpath/java/lang/Short.java b/libjava/classpath/java/lang/Short.java new file mode 100644 index 00000000000..fbeea915bd3 --- /dev/null +++ b/libjava/classpath/java/lang/Short.java @@ -0,0 +1,353 @@ +/* Short.java -- object wrapper for short + Copyright (C) 1998, 2001, 2002, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.lang; + +/** + * Instances of class Short represent primitive + * short values. + * + * Additionally, this class provides various helper functions and variables + * related to shorts. + * + * @author Paul Fisher + * @author John Keiser + * @author Eric Blake (ebb9@email.byu.edu) + * @since 1.1 + * @status updated to 1.4 + */ +public final class Short extends Number implements Comparable +{ + /** + * Compatible with JDK 1.1+. + */ + private static final long serialVersionUID = 7515723908773894738L; + + /** + * The minimum value a short can represent is -32768 (or + * -215). + */ + public static final short MIN_VALUE = -32768; + + /** + * The minimum value a short can represent is 32767 (or + * 215). + */ + public static final short MAX_VALUE = 32767; + + /** + * The primitive type short is represented by this + * Class object. + */ + public static final Class TYPE = VMClassLoader.getPrimitiveClass('S'); + + /** + * The immutable value of this Short. + * + * @serial the wrapped short + */ + private final short value; + + /** + * Create a Short object representing the value of the + * short argument. + * + * @param value the value to use + */ + public Short(short value) + { + this.value = value; + } + + /** + * Create a Short object representing the value of the + * argument after conversion to a short. + * + * @param s the string to convert + * @throws NumberFormatException if the String cannot be parsed + */ + public Short(String s) + { + value = parseShort(s, 10); + } + + /** + * Converts the short to a String and assumes + * a radix of 10. + * + * @param s the short to convert to String + * @return the String representation of the argument + */ + public static String toString(short s) + { + return String.valueOf(s); + } + + /** + * Converts the specified String into a short. + * This function assumes a radix of 10. + * + * @param s the String to convert + * @return the short value of s + * @throws NumberFormatException if s cannot be parsed as a + * short + */ + public static short parseShort(String s) + { + return parseShort(s, 10); + } + + /** + * Converts the specified String into a short + * using the specified radix (base). The string must not be null + * or empty. It may begin with an optional '-', which will negate the answer, + * provided that there are also valid digits. Each digit is parsed as if by + * Character.digit(d, radix), and must be in the range + * 0 to radix - 1. Finally, the result must be + * within MIN_VALUE to MAX_VALUE, inclusive. + * Unlike Double.parseDouble, you may not have a leading '+'. + * + * @param s the String to convert + * @param radix the radix (base) to use in the conversion + * @return the String argument converted to short + * @throws NumberFormatException if s cannot be parsed as a + * short + */ + public static short parseShort(String s, int radix) + { + int i = Integer.parseInt(s, radix, false); + if ((short) i != i) + throw new NumberFormatException(); + return (short) i; + } + + /** + * Creates a new Short object using the String + * and specified radix (base). + * + * @param s the String to convert + * @param radix the radix (base) to convert with + * @return the new Short + * @throws NumberFormatException if s cannot be parsed as a + * short + * @see #parseShort(String, int) + */ + public static Short valueOf(String s, int radix) + { + return new Short(parseShort(s, radix)); + } + + /** + * Creates a new Short object using the String, + * assuming a radix of 10. + * + * @param s the String to convert + * @return the new Short + * @throws NumberFormatException if s cannot be parsed as a + * short + * @see #Short(String) + * @see #parseShort(String) + */ + public static Short valueOf(String s) + { + return new Short(parseShort(s, 10)); + } + + /** + * Convert the specified String into a Short. + * The String may represent decimal, hexadecimal, or + * octal numbers. + * + *

The extended BNF grammar is as follows:
+ * 

+   * DecodableString:
+   *      ( [ - ] DecimalNumber )
+   *    | ( [ - ] ( 0x | 0X
+   *              | # ) HexDigit { HexDigit } )
+   *    | ( [ - ] 0 { OctalDigit } )
+   * DecimalNumber:
+   *        DecimalDigit except '0' { DecimalDigit }
+   * DecimalDigit:
+   *        Character.digit(d, 10) has value 0 to 9
+   * OctalDigit:
+   *        Character.digit(d, 8) has value 0 to 7
+   * DecimalDigit:
+   *        Character.digit(d, 16) has value 0 to 15
+   *
+ * Finally, the value must be in the range MIN_VALUE to + * MAX_VALUE, or an exception is thrown. + * + * @param s the String to interpret + * @return the value of the String as a Short + * @throws NumberFormatException if s cannot be parsed as a + * short + * @throws NullPointerException if s is null + * @see Integer#decode(String) + */ + public static Short decode(String s) + { + int i = Integer.parseInt(s, 10, true); + if ((short) i != i) + throw new NumberFormatException(); + return new Short((short) i); + } + + /** + * Return the value of this Short as a byte. + * + * @return the byte value + */ + public byte byteValue() + { + return (byte) value; + } + + /** + * Return the value of this Short. + * + * @return the short value + */ + public short shortValue() + { + return value; + } + + /** + * Return the value of this Short as an int. + * + * @return the int value + */ + public int intValue() + { + return value; + } + + /** + * Return the value of this Short as a long. + * + * @return the long value + */ + public long longValue() + { + return value; + } + + /** + * Return the value of this Short as a float. + * + * @return the float value + */ + public float floatValue() + { + return value; + } + + /** + * Return the value of this Short as a double. + * + * @return the double value + */ + public double doubleValue() + { + return value; + } + + /** + * Converts the Short value to a String and + * assumes a radix of 10. + * + * @return the String representation of this Short + */ + public String toString() + { + return String.valueOf(value); + } + + /** + * Return a hashcode representing this Object. Short's hash + * code is simply its value. + * + * @return this Object's hash code + */ + public int hashCode() + { + return value; + } + + /** + * Returns true if obj is an instance of + * Short and represents the same short value. + * + * @param obj the object to compare + * @return whether these Objects are semantically equal + */ + public boolean equals(Object obj) + { + return obj instanceof Short && value == ((Short) obj).value; + } + + /** + * Compare two Shorts numerically by comparing their short + * values. The result is positive if the first is greater, negative if the + * second is greater, and 0 if the two are equal. + * + * @param s the Short to compare + * @return the comparison + * @since 1.2 + */ + public int compareTo(Short s) + { + return value - s.value; + } + + /** + * Behaves like compareTo(Short) unless the Object + * is not a Short. + * + * @param o the object to compare + * @return the comparison + * @throws ClassCastException if the argument is not a Short + * @see #compareTo(Short) + * @see Comparable + * @since 1.2 + */ + public int compareTo(Object o) + { + return compareTo((Short)o); + } +} -- cgit v1.2.1