diff -r c78acf6c2f3e -r fcf89720ae71 src/share/classes/com/sun/tools/javac/code/TargetType.java
--- a/src/share/classes/com/sun/tools/javac/code/TargetType.java	Mon Dec 10 12:10:50 2012 +0000
+++ b/src/share/classes/com/sun/tools/javac/code/TargetType.java	Mon Dec 10 16:21:26 2012 +0000
@@ -166,7 +166,7 @@
     static final int MAXIMUM_TARGET_TYPE_VALUE = 0x22;
 
     private final int targetTypeValue;
-    private Set<TargetAttribute> flags;
+    private final Set<TargetAttribute> flags;
 
     TargetType(int targetTypeValue, TargetAttribute... attributes) {
         if (targetTypeValue < Byte.MIN_VALUE
@@ -233,10 +233,10 @@
         return this.targetTypeValue;
     }
 
-    private static TargetType[] targets = null;
+    private static final TargetType[] targets;
 
-    private static TargetType[] buildTargets() {
-        TargetType[] targets = new TargetType[MAXIMUM_TARGET_TYPE_VALUE + 1];
+    static {
+        targets = new TargetType[MAXIMUM_TARGET_TYPE_VALUE + 1];
         TargetType[] alltargets = values();
         for (TargetType target : alltargets) {
             if (target.targetTypeValue >= 0)
@@ -246,13 +246,9 @@
             if (targets[i] == null)
                 targets[i] = UNKNOWN;
         }
-        return targets;
     }
 
     public static boolean isValidTargetTypeValue(int tag) {
-        if (targets == null)
-            targets = buildTargets();
-
         if (((byte)tag) == ((byte)UNKNOWN.targetTypeValue))
             return true;
 
@@ -260,9 +256,6 @@
     }
 
     public static TargetType fromTargetTypeValue(int tag) {
-        if (targets == null)
-            targets = buildTargets();
-
         if (((byte)tag) == ((byte)UNKNOWN.targetTypeValue))
             return UNKNOWN;