diff options
Diffstat (limited to 'libjava/classpath/java/lang/Byte.java')
| -rw-r--r-- | libjava/classpath/java/lang/Byte.java | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/libjava/classpath/java/lang/Byte.java b/libjava/classpath/java/lang/Byte.java index 338e2167aa1..2560bfcffc3 100644 --- a/libjava/classpath/java/lang/Byte.java +++ b/libjava/classpath/java/lang/Byte.java @@ -50,7 +50,7 @@ package java.lang; * @author Per Bothner * @author Eric Blake (ebb9@email.byu.edu) * @since 1.1 - * @status updated to 1.4 + * @status updated to 1.5 */ public final class Byte extends Number implements Comparable { @@ -78,6 +78,16 @@ public final class Byte extends Number implements Comparable public static final Class TYPE = VMClassLoader.getPrimitiveClass('B'); /** + * The number of bits needed to represent a <code>byte</code>. + * @since 1.5 + */ + public static final int SIZE = 8; + + // This caches Byte values, and is used by boxing conversions via + // valueOf(). We're required to cache all possible values here. + private static Byte[] byteCache = new Byte[MAX_VALUE - MIN_VALUE + 1]; + + /** * The immutable value of this Byte. * * @serial the wrapped byte @@ -192,6 +202,26 @@ public final class Byte extends Number implements Comparable } /** + * Returns a <code>Byte</code> object wrapping the value. + * In contrast to the <code>Byte</code> constructor, this method + * will cache some values. It is used by boxing conversion. + * + * @param val the value to wrap + * @return the <code>Byte</code> + * + * @since 1.5 + */ + public static Byte valueOf(byte val) + { + synchronized (byteCache) + { + if (byteCache[val - MIN_VALUE] == null) + byteCache[val - MIN_VALUE] = new Byte(val); + return byteCache[val - MIN_VALUE]; + } + } + + /** * Convert the specified <code>String</code> into a <code>Byte</code>. * The <code>String</code> may represent decimal, hexadecimal, or * octal numbers. |