src/java.base/share/classes/java/nio/StringCharBuffer.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2019, 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -23,10 +23,11 @@
  * questions.
  */
 
 package java.nio;
 
+import java.util.Objects;
 
 // ## If the sequence is a string, use reflection to share its array
 
 class StringCharBuffer                                  // package-private
     extends CharBuffer

@@ -49,10 +50,21 @@
                                     this.remaining(),
                                     this.remaining(),
                                     offset + this.position());
     }
 
+    @Override
+    public CharBuffer slice(int index, int length) {
+        Objects.checkFromIndexSize(index, length, limit());
+        return new StringCharBuffer(str,
+                                    -1,
+                                    0,
+                                    length,
+                                    length,
+                                    offset + index);
+    }
+
     private StringCharBuffer(CharSequence s,
                              int mark,
                              int pos,
                              int limit,
                              int cap,