src/java.base/share/classes/java/io/StringWriter.java

rev 15365 : imported patch 8163517-Various-cleanup-in-java-io-code

@@ -137,22 +137,19 @@
      * character buffer will return a subsequence whose content depends upon
      * the buffer's position and limit.
      *
      * @param  csq
      *         The character sequence to append.  If {@code csq} is
-     *         {@code null}, then the four characters "{@code null}" are
+     *         {@code null}, then the four characters {@code "null"} are
      *         appended to this writer.
      *
      * @return  This writer
      *
      * @since  1.5
      */
     public StringWriter append(CharSequence csq) {
-        if (csq == null)
-            write("null");
-        else
-            write(csq.toString());
+        write(String.valueOf(csq));
         return this;
     }
 
     /**
      * Appends a subsequence of the specified character sequence to this writer.

@@ -168,11 +165,11 @@
      *
      * @param  csq
      *         The character sequence from which a subsequence will be
      *         appended.  If {@code csq} is {@code null}, then characters
      *         will be appended as if {@code csq} contained the four
-     *         characters "{@code null}".
+     *         characters {@code "null"}.
      *
      * @param  start
      *         The index of the first character in the subsequence
      *
      * @param  end

@@ -187,13 +184,12 @@
      *          {@code csq.length()}
      *
      * @since  1.5
      */
     public StringWriter append(CharSequence csq, int start, int end) {
-        CharSequence cs = (csq == null ? "null" : csq);
-        write(cs.subSequence(start, end).toString());
-        return this;
+        if (csq == null) csq = "null";
+        return append(csq.subSequence(start, end));
     }
 
     /**
      * Appends the specified character to this writer.
      *