8276042: Remove unused local variables in java.naming

Reviewed-by: aefimov, dfuchs, vtewari

src/java.naming/share/classes/com/sun/jndi/ldap/Filter.java

@@ -307,7 +307,6 @@ private static void encodeSimpleFilter(BerEncoder ber, byte[] filter,
             dbgIndent++;
         }
 
-        String type, value;
         int valueStart, valueEnd, typeStart, typeEnd;
 
         int eq;

src/java.naming/share/classes/com/sun/jndi/ldap/LdapCtx.java

@@ -2603,7 +2603,6 @@ private static Vector<Vector<String>> extractURLs(String refString) {
 
         Vector<Vector<String>> referrals = new Vector<>(urlCount);
         int iURL;
-        int i = 0;
 
         separator = refString.indexOf('\n');
         iURL = separator + 1;

src/java.naming/share/classes/com/sun/jndi/ldap/sasl/SaslOutputStream.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2003, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -73,7 +73,7 @@ public void write(int b) throws IOException {
      */
     public void write(byte[] buffer, int offset, int total) throws IOException {
         int count;
-        byte[] wrappedToken, saslBuffer;
+        byte[] wrappedToken;
 
         // "Packetize" buffer to be within rawSendSize
         if (debug) {

src/java.naming/share/classes/com/sun/jndi/toolkit/ctx/Continuation.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -134,7 +134,7 @@ public void setSuccess() {
     /**
      * Fills in an exception's fields using data from this Continuation.
      * The resolved name is set by subtracting remainingName from starter.
-     * %%% This might not not always produce the correct answer wrt trailing "/".
+     * %%% This might not always produce the correct answer wrt trailing "/".
      * If the exception is a CannotProceedException, its environment,
      * altName, and altNameCtx fields are set using this continuation's
      * environment, relativeResolvedName, and resolvedContext.
@@ -296,8 +296,6 @@ private void setContinueAux(Object resObj,
      * @param currCtx The non-null context from which relResName is to be resolved.
      */
     public void setContinueNNS(Object resObj, Name relResName, Context currCtx) {
-        CompositeName rname = new CompositeName();
-
         setContinue(resObj, relResName, currCtx, PartialCompositeContext._NNS_NAME);
     }
 

src/java.naming/share/classes/com/sun/jndi/toolkit/ctx/PartialCompositeContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -510,12 +510,11 @@ protected static PartialCompositeContext getPCContext(Continuation cont)
             throws NamingException {
 
         Object obj = cont.getResolvedObj();
-        PartialCompositeContext pctx = null;
 
-        if (obj instanceof PartialCompositeContext) {
+        if (obj instanceof PartialCompositeContext partialCtx) {
             // Just cast if octx already is PartialCompositeContext
             // %%% ignoring environment for now
-            return (PartialCompositeContext)obj;
+            return partialCtx;
         } else {
             throw cont.fillInException(new CannotProceedException());
         }