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authorTom Tromey <tromey@redhat.com>2002-06-15 19:45:34 +0000
committerTom Tromey <tromey@gcc.gnu.org>2002-06-15 19:45:34 +0000
commit3e1b181a6785c3b77b1cd877a8f6759efad6cfe8 (patch)
tree6325e924516b02fb0d87553b0923dd855f975914 /libjava/java/lang/Byte.java
parent34442f32a2407deff70df24c62713044748caf84 (diff)
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AbstractMethodError.java: Re-merged with Classpath.
* java/lang/AbstractMethodError.java: Re-merged with Classpath. * java/lang/ArithmeticException.java: Likewise. * java/lang/ArrayIndexOutOfBoundsException.java: Likewise. * java/lang/ArrayStoreException.java: Likewise. * java/lang/Byte.java: Likewise. * java/lang/CharSequence.java: Likewise. * java/lang/ClassCastException.java: Likewise. * java/lang/ClassCircularityError.java: Likewise. * java/lang/ClassFormatError.java: Likewise. * java/lang/CloneNotSupportedException.java: Likewise. * java/lang/Cloneable.java: Likewise. * java/lang/Comparable.java: Likewise. * java/lang/Compiler.java: Likewise. * java/lang/Error.java: Likewise. * java/lang/ExceptionInInitializerError.java: Likewise. * java/lang/IllegalAccessError.java: Likewise. * java/lang/IllegalAccessException.java: Likewise. * java/lang/IllegalArgumentException.java: Likewise. * java/lang/IllegalMonitorStateException.java: Likewise. * java/lang/IllegalStateException.java: Likewise. * java/lang/IllegalThreadStateException.java: Likewise. * java/lang/IncompatibleClassChangeError.java: Likewise. * java/lang/IndexOutOfBoundsException.java: Likewise. * java/lang/InheritableThreadLocal.java: Likewise. * java/lang/InstantiationError.java: Likewise. * java/lang/InstantiationException.java: Likewise. * java/lang/InternalError.java: Likewise. * java/lang/InterruptedException.java: Likewise. * java/lang/LinkageError.java: Likewise. * java/lang/NegativeArraySizeException.java: Likewise. * java/lang/NoClassDefFoundError.java: Likewise. * java/lang/NoSuchFieldError.java: Likewise. * java/lang/NoSuchFieldException.java: Likewise. * java/lang/NoSuchMethodError.java: Likewise. * java/lang/NoSuchMethodException.java: Likewise. * java/lang/NullPointerException.java: Likewise. * java/lang/NumberFormatException.java: Likewise. * java/lang/OutOfMemoryError.java: Likewise. * java/lang/Process.java: Likewise. * java/lang/Runnable.java: Likewise. * java/lang/RuntimePermission.java: Likewise. * java/lang/SecurityException.java: Likewise. * java/lang/Short.java: Likewise. * java/lang/StackOverflowError.java: Likewise. * java/lang/StringIndexOutOfBoundsException.java: Likewise. * java/lang/ThreadDeath.java: Likewise. * java/lang/ThreadLocal.java: Likewise. * java/lang/UnknownError.java: Likewise. * java/lang/UnsatisfiedLinkError.java: Likewise. * java/lang/UnsupportedClassVersionError.java: Likewise. * java/lang/UnsupportedOperationException.java: Likewise. * java/lang/VerifyError.java: Likewise. * java/lang/VirtualMachineError.java: Likewise. * java/lang/reflect/InvocationTargetException.java: Likewise. * java/net/BindException.java: Likewise. * java/net/ConnectException.java: Likewise. * java/net/MalformedURLException.java: Likewise. * java/net/NoRouteToHostException.java: Likewise. * java/net/ProtocolException.java: Likewise. * java/net/SocketException.java: Likewise. * java/net/UnknownHostException.java: Likewise. * java/net/UnknownServiceException.java: Likewise. From-SVN: r54656
Diffstat (limited to 'libjava/java/lang/Byte.java')
-rw-r--r--libjava/java/lang/Byte.java343
1 files changed, 193 insertions, 150 deletions
diff --git a/libjava/java/lang/Byte.java b/libjava/java/lang/Byte.java
index eab2d53..7605ad7 100644
--- a/libjava/java/lang/Byte.java
+++ b/libjava/java/lang/Byte.java
@@ -1,5 +1,5 @@
/* Byte.java -- object wrapper for byte
- Copyright (C) 1998, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1998, 2001, 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
@@ -7,7 +7,7 @@ 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
@@ -48,267 +48,310 @@ package java.lang;
* @author Paul Fisher
* @author John Keiser
* @author Per Bothner
- * @since JDK 1.0
+ * @author Eric Blake <ebb9@email.byu.edu>
+ * @since 1.1
+ * @status updated to 1.4
*/
-public final class Byte extends Number implements Comparable
+public final class Byte extends Number implements Comparable
{
- static final long serialVersionUID = -7183698231559129828L;
+ /**
+ * Compatible with JDK 1.1+.
+ */
+ private static final long serialVersionUID = -7183698231559129828L;
/**
- * The minimum value a <code>byte</code> can represent is -128.
+ * The minimum value a <code>byte</code> can represent is -128 (or
+ * -2<sup>7</sup>).
*/
public static final byte MIN_VALUE = -128;
/**
- * The maximum value a <code>byte</code> can represent is 127.
+ * The maximum value a <code>byte</code> can represent is 127 (or
+ * 2<sup>7</sup> - 1).
*/
public static final byte MAX_VALUE = 127;
/**
- * The primitive type <code>byte</code> is represented by this
+ * The primitive type <code>byte</code> is represented by this
* <code>Class</code> object.
*/
public static final Class TYPE = VMClassLoader.getPrimitiveClass('B');
/**
* The immutable value of this Byte.
+ *
+ * @serial the wrapped byte
*/
private final byte value;
/**
- * Create a <code>Byte</code> object representing the value of the
+ * Create a <code>Byte</code> object representing the value of the
* <code>byte</code> argument.
*
* @param value the value to use
- */
- public Byte(byte value)
+ */
+ public Byte(byte value)
{
this.value = value;
}
/**
- * Create a <code>Byte</code> object representing the value specified
- * by the <code>String</code> argument.
+ * Create a <code>Byte</code> object representing the value specified
+ * by the <code>String</code> argument
*
- * @param s the string to convert.
+ * @param s the string to convert
+ * @throws NumberFormatException if the String does not contain a byte
+ * @see #valueOf(String)
*/
- public Byte(String s) throws NumberFormatException
+ public Byte(String s)
{
value = parseByte(s, 10);
}
/**
- * Return a hashcode representing this Object.
- *
- * <code>Byte</code>'s hash code is calculated by simply returning its
- * value.
+ * Converts the <code>byte</code> to a <code>String</code> and assumes
+ * a radix of 10.
*
- * @return this Object's hash code.
+ * @param b the <code>byte</code> to convert to <code>String</code>
+ * @return the <code>String</code> representation of the argument
*/
- public int hashCode()
+ public static String toString(byte b)
{
- return value;
+ return String.valueOf(b);
}
/**
- * Returns <code>true</code> if <code>obj</code> is an instance of
- * <code>Byte</code> and represents the same byte value.
- * @return whether these Objects are semantically equal.
- */
- public boolean equals(Object obj)
- {
- return ((obj instanceof Byte) && (value == ((Byte)obj).byteValue()));
- }
-
- /**
- * Converts the <code>byte</code> to a <code>String</code> and assumes
- * a radix of 10.
- * @param i the <code>byte</code> to convert to <code>String</code>
- * @return the <code>String</code> representation of the argument.
- */
- public static String toString(byte i)
+ * Converts the specified <code>String</code> into a <code>byte</code>.
+ * This function assumes a radix of 10.
+ *
+ * @param s the <code>String</code> to convert
+ * @return the <code>byte</code> value of <code>s</code>
+ * @throws NumberFormatException if <code>s</code> cannot be parsed as a
+ * <code>byte</code>
+ * @see #parseByte(String)
+ */
+ public static byte parseByte(String s)
{
- return Integer.toString ((int) i);
+ return parseByte(s, 10);
}
/**
- * Converts the <code>Byte</code> value to a <code>String</code> and
- * assumes a radix of 10.
- * @return the <code>String</code> representation of this <code>Byte</code>.
- */
- public String toString()
- {
- return Integer.toString ((int) value);
- }
-
- /**
- * Creates a new <code>Byte</code> object using the <code>String</code>,
- * assuming a radix of 10.
- * @param s the <code>String</code> to convert.
- * @return the new <code>Byte</code>.
- * @see #Byte(java.lang.String)
- * @see #parseByte(java.lang.String)
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as a <code>byte</code>.
+ * Converts the specified <code>String</code> into an <code>int</code>
+ * using the specified radix (base). The string must not be <code>null</code>
+ * 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
+ * <code>Character.digit(d, radix)</code>, and must be in the range
+ * <code>0</code> to <code>radix - 1</code>. Finally, the result must be
+ * within <code>MIN_VALUE</code> to <code>MAX_VALUE</code>, inclusive.
+ * Unlike Double.parseDouble, you may not have a leading '+'.
+ *
+ * @param s the <code>String</code> to convert
+ * @param radix the radix (base) to use in the conversion
+ * @return the <code>String</code> argument converted to </code>byte</code>
+ * @throws NumberFormatException if <code>s</code> cannot be parsed as a
+ * <code>byte</code>
*/
- public static Byte valueOf(String s) throws NumberFormatException
+ public static byte parseByte(String s, int radix)
{
- return new Byte(parseByte(s));
+ int i = Integer.parseInt(s, radix, false);
+ if ((byte) i != i)
+ throw new NumberFormatException();
+ return (byte) i;
}
/**
* Creates a new <code>Byte</code> object using the <code>String</code>
* and specified radix (base).
- * @param s the <code>String</code> to convert.
- * @param radix the radix (base) to convert with.
- * @return the new <code>Byte</code>.
- * @see #parseByte(java.lang.String,int)
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as a <code>byte</code>.
- */
- public static Byte valueOf(String s, int radix)
- throws NumberFormatException
- {
- return new Byte(parseByte(s, radix));
- }
-
- /**
- * Converts the specified <code>String</code> into a <code>byte</code>.
- * This function assumes a radix of 10.
*
* @param s the <code>String</code> to convert
- * @return the <code>byte</code> value of the <code>String</code>
- * argument.
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as a <code>byte</code>.
+ * @param radix the radix (base) to convert with
+ * @return the new <code>Byte</code>
+ * @throws NumberFormatException if <code>s</code> cannot be parsed as a
+ * <code>byte</code>
+ * @see #parseByte(String, int)
*/
- public static byte parseByte(String s) throws NumberFormatException
+ public static Byte valueOf(String s, int radix)
{
- return parseByte(s, 10);
+ return new Byte(parseByte(s, radix));
}
/**
- * Converts the specified <code>String</code> into a <code>byte</code>
- * using the specified radix (base).
+ * Creates a new <code>Byte</code> object using the <code>String</code>,
+ * assuming a radix of 10.
*
- * @param str the <code>String</code> to convert
- * @param radix the radix (base) to use in the conversion
- * @return the <code>String</code> argument converted to </code>byte</code>.
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as a <code>byte</code>.
+ * @param s the <code>String</code> to convert
+ * @return the new <code>Byte</code>
+ * @throws NumberFormatException if <code>s</code> cannot be parsed as a
+ * <code>byte</code>
+ * @see #Byte(String)
+ * @see #parseByte(String)
*/
- public static byte parseByte(String str, int radix)
- throws NumberFormatException
+ public static Byte valueOf(String s)
{
- int i = Integer.parseInt(str, radix);
- if (i < MIN_VALUE || i > MAX_VALUE)
- throw new NumberFormatException();
- return (byte) i;
+ return new Byte(parseByte(s, 10));
}
/**
* Convert the specified <code>String</code> into a <code>Byte</code>.
- * The <code>String</code> may represent decimal, hexadecimal, or
+ * The <code>String</code> may represent decimal, hexadecimal, or
* octal numbers.
*
- * The <code>String</code> argument is interpreted based on the leading
- * characters. Depending on what the String begins with, the base will be
- * interpreted differently:
+ * <p>The extended BNF grammar is as follows:<br>
+ * <pre>
+ * <em>DecodableString</em>:
+ * ( [ <code>-</code> ] <em>DecimalNumber</em> )
+ * | ( [ <code>-</code> ] ( <code>0x</code> | <code>0X</code>
+ * | <code>#</code> ) { <em>HexDigit</em> }+ )
+ * | ( [ <code>-</code> ] <code>0</code> { <em>OctalDigit</em> } )
+ * <em>DecimalNumber</em>:
+ * <em>DecimalDigit except '0'</em> { <em>DecimalDigit</em> }
+ * <em>DecimalDigit</em>:
+ * <em>Character.digit(d, 10) has value 0 to 9</em>
+ * <em>OctalDigit</em>:
+ * <em>Character.digit(d, 8) has value 0 to 7</em>
+ * <em>DecimalDigit</em>:
+ * <em>Character.digit(d, 16) has value 0 to 15</em>
+ * </pre>
+ * Finally, the value must be in the range <code>MIN_VALUE</code> to
+ * <code>MAX_VALUE</code>, or an exception is thrown.
*
- * <table>
- * <tr><th>Leading<br>Characters</th><th>Base</th></tr>
- * <tr><td>#</td><td>16</td></tr>
- * <tr><td>0x</td><td>16</td></tr>
- * <tr><td>0X</td><td>16</td></tr>
- * <tr><td>0</td><td>8</td></tr>
- * <tr><td>Anything<br>Else</td><td>10</td></tr>
- * </table>
- *
- * @param str the <code>String</code> to interpret.
- * @return the value of the String as a <code>Byte</code>.
- * @exception NumberFormatException thrown if the <code>String</code>
- * cannot be parsed as a <code>byte</code>.
+ * @param s the <code>String</code> to interpret
+ * @return the value of the String as a <code>Byte</code>
+ * @throws NumberFormatException if <code>s</code> cannot be parsed as a
+ * <code>byte</code>
+ * @throws NullPointerException if <code>s</code> is null
+ * @see Integer#decode(String)
*/
- public static Byte decode(String str) throws NumberFormatException
+ public static Byte decode(String s)
{
- int i = (Integer.decode(str)).intValue();
- if (i < MIN_VALUE || i > MAX_VALUE)
+ int i = Integer.parseInt(s, 10, true);
+ if ((byte) i != i)
throw new NumberFormatException();
return new Byte((byte) i);
}
-
- /** Return the value of this <code>Byte</code> as an <code>short</code>.
- ** @return the value of this <code>Byte</code> as an <code>short</code>.
- **/
+
+ /**
+ * Return the value of this <code>Byte</code>.
+ *
+ * @return the byte value
+ */
public byte byteValue()
{
return value;
}
- /** Return the value of this <code>Byte</code> as an <code>short</code>.
- ** @return the value of this <code>Byte</code> as an <code>short</code>.
- **/
+ /**
+ * Return the value of this <code>Byte</code> as a <code>short</code>.
+ *
+ * @return the short value
+ */
public short shortValue()
{
return value;
}
- /** Return the value of this <code>Byte</code> as an <code>int</code>.
- ** @return the value of this <code>Byte</code> as an <code>int</code>.
- **/
+ /**
+ * Return the value of this <code>Byte</code> as an <code>int</code>.
+ *
+ * @return the int value
+ */
public int intValue()
{
return value;
}
- /** Return the value of this <code>Byte</code> as a <code>long</code>.
- ** @return the value of this <code>Byte</code> as a <code>long</code>.
- **/
+ /**
+ * Return the value of this <code>Byte</code> as a <code>long</code>.
+ *
+ * @return the long value
+ */
public long longValue()
{
return value;
}
- /** Return the value of this <code>Byte</code> as a <code>float</code>.
- ** @return the value of this <code>Byte</code> as a <code>float</code>.
- **/
+ /**
+ * Return the value of this <code>Byte</code> as a <code>float</code>.
+ *
+ * @return the float value
+ */
public float floatValue()
{
return value;
}
- /** Return the value of this <code>Byte</code> as a <code>double</code>.
- ** @return the value of this <code>Byte</code> as a <code>double</code>.
- **/
+ /**
+ * Return the value of this <code>Byte</code> as a <code>double</code>.
+ *
+ * @return the double value
+ */
public double doubleValue()
{
return value;
}
-
+
/**
- * Compare two Bytes numerically by comparing their
- * <code>byte</code> values.
- * @return a positive value if this <code>Byte</code> is greater
- * in value than the argument <code>Byte</code>; a negative value
- * if this <code>Byte</code> is smaller in value than the argument
- * <code>Byte</code>; and <code>0</code>, zero, if this
- * <code>Byte</code> is equal in value to the argument
- * <code>Byte</code>.
+ * Converts the <code>Byte</code> value to a <code>String</code> and
+ * assumes a radix of 10.
+ *
+ * @return the <code>String</code> representation of this <code>Byte</code>
+ * @see Integer#toString()
+ */
+ public String toString()
+ {
+ return String.valueOf(value);
+ }
+
+ /**
+ * Return a hashcode representing this Object. <code>Byte</code>'s hash
+ * code is simply its value.
+ *
+ * @return this Object's hash code
+ */
+ public int hashCode()
+ {
+ return value;
+ }
+
+ /**
+ * Returns <code>true</code> if <code>obj</code> is an instance of
+ * <code>Byte</code> and represents the same byte value.
+ *
+ * @param obj the object to compare
+ * @return whether these Objects are semantically equal
+ */
+ public boolean equals(Object obj)
+ {
+ return obj instanceof Byte && value == ((Byte) obj).value;
+ }
+
+ /**
+ * Compare two Bytes numerically by comparing their <code>byte</code> values.
+ * The result is positive if the first is greater, negative if the second
+ * is greater, and 0 if the two are equal.
+ *
+ * @param b the Byte to compare
+ * @return the comparison
+ * @since 1.2
*/
public int compareTo(Byte b)
{
- return (int)(value - b.byteValue());
+ return value - b.value;
}
-
+
/**
- * Behaves like <code>compareTo(java.lang.Byte)</code> unless the Object
- * is not a <code>Byte</code>. Then it throws a
- * <code>ClassCastException</code>.
- * @exception ClassCastException if the argument is not a
- * <code>Byte</code>.
+ * Behaves like <code>compareTo(Byte)</code> unless the Object
+ * is not a <code>Byte</code>.
+ *
+ * @param o the object to compare
+ * @return the comparison
+ * @throws ClassCastException if the argument is not a <code>Byte</code>
+ * @see #compareTo(Byte)
+ * @see Comparable
+ * @since 1.2
*/
public int compareTo(Object o)
{
- return compareTo((Byte)o);
+ return compareTo((Byte) o);
}
}