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

@@ -1043,12 +1043,13 @@
             } else {
                 return nonSyncContentEquals((AbstractStringBuilder)cs);
             }
         }
         // Argument is a String
-        if (cs.equals(this))
-            return true;
+        if (cs instanceof String) {
+           return equals((String)cs);
+        }
         // Argument is a generic CharSequence
         char v1[] = value;
         int n = v1.length;
         if (n != cs.length()) {
             return false;