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

*** 235,240 ****
--- 235,255 ----
                          new CodePointIterator(),
                          Spliterator.ORDERED),
                  Spliterator.ORDERED,
                  false);
      }
+ 
+     /**
+      * Returns a {@code CharSequence} of specified length representing repetitions
+      * of the same character.
+      *
+      * @param c the character to be repeated
+      * @param length the length of resulting {@code CharSequence}
+      * @return a {@code CharSequence} of {@code length} repetitions of
+      * character {@code c}.
+      * @throws IllegalArgumentException if given {@code length} is negative
+      * @since 10
+      */
+     static CharSequence repetitions(char c, int length) {
+         return new CharRepetitions(c, length);
+     }
  }