public MutableString(final char[] a){
  makeCompactMutableString(a.length);
  System.arraycopy(a,0,array,0,array.length);
}

public MutableString ( final char [ ] a ) { makeCompactMutableString ( a . length ) ; System . arraycopy ( a , 0 , array , 0 , array . length ) ; }
creates a new compact mutable string copying a given character array .
