src/java.base/share/classes/java/lang/StringCoding.java

8200310: Avoid charset lookup machinery in java.nio.charset.StandardCharsets
Reviewed-by: sherman

@@ -50,10 +50,13 @@
 import static java.lang.Character.isSurrogate;
 import static java.lang.Character.highSurrogate;
 import static java.lang.Character.lowSurrogate;
 import static java.lang.Character.isSupplementaryCodePoint;
 import static java.lang.StringUTF16.putChar;
+import static java.nio.charset.StandardCharsets.ISO_8859_1;
+import static java.nio.charset.StandardCharsets.US_ASCII;
+import static java.nio.charset.StandardCharsets.UTF_8;
 
 /**
  * Utility class for string encoding and decoding.
  */
 

@@ -65,14 +68,10 @@
     private static final ThreadLocal<SoftReference<StringDecoder>> decoder =
         new ThreadLocal<>();
     private static final ThreadLocal<SoftReference<StringEncoder>> encoder =
         new ThreadLocal<>();
 
-    private static final Charset ISO_8859_1 = sun.nio.cs.ISO_8859_1.INSTANCE;
-    private static final Charset US_ASCII = sun.nio.cs.US_ASCII.INSTANCE;
-    private static final Charset UTF_8 = sun.nio.cs.UTF_8.INSTANCE;
-
     private static <T> T deref(ThreadLocal<SoftReference<T>> tl) {
         SoftReference<T> sr = tl.get();
         if (sr == null)
             return null;
         return sr.get();