1 files changed, 44 insertions, 0 deletions
diff --git a/libjava/classpath/java/lang/Short.java b/libjava/classpath/java/lang/Short.java
index fbeea915bd3..eb40cd9e0e6 100644
--- a/libjava/classpath/java/lang/Short.java
+++ b/libjava/classpath/java/lang/Short.java
@@ -77,6 +77,19 @@ public final class Short extends Number implements Comparable
   public static final Class TYPE = VMClassLoader.getPrimitiveClass('S');
 
   /**
+   * The number of bits needed to represent a <code>short</code>.
+   * @since 1.5
+   */
+  public static final int SIZE = 16;
+
+  // This caches some Short values, and is used by boxing conversions
+  // via valueOf().  We must cache at least -128..127; these constants
+  // control how much we actually cache.
+  private static final int MIN_CACHE = -128;
+  private static final int MAX_CACHE = 127;
+  private static Short[] shortCache = new Short[MAX_CACHE - MIN_CACHE + 1];
+
+  /**
    * The immutable value of this Short.
    *
    * @serial the wrapped short
@@ -189,6 +202,28 @@ public final class Short extends Number implements Comparable
   }
 
   /**
+   * Returns a <code>Short</code> object wrapping the value.
+   * In contrast to the <code>Short</code> constructor, this method
+   * will cache some values.  It is used by boxing conversion.
+   *
+   * @param val the value to wrap
+   * @return the <code>Short</code>
+   *
+   * @since 1.5
+   */
+  public static Short valueOf(short val)
+  {
+    if (val < MIN_CACHE || val > MAX_CACHE)
+      return new Short(val);
+    synchronized (shortCache)
+      {
+    if (shortCache[val - MIN_CACHE] == null)
+      shortCache[val - MIN_CACHE] = new Short(val);
+    return shortCache[val - MIN_CACHE];
+      }
+  }
+
+  /**
    * Convert the specified <code>String</code> into a <code>Short</code>.
    * The <code>String</code> may represent decimal, hexadecimal, or
    * octal numbers.
@@ -350,4 +385,13 @@ public final class Short extends Number implements Comparable
   {
     return compareTo((Short)o);
   }
+
+  /**
+   * Reverse the bytes in val.
+   * @since 1.5
+   */
+  public static short reverseBytes(short val)
+  {
+    return (short) (((val >> 8) & 0xff) | ((val << 8) & 0xff00));
+  }
 }