public StringBuilder(java.lang.String str){
  count=str.length();
  value=new char[count + INITIAL_CAPACITY];
  str.getChars(0,count,value,0);
}

public StringBuilder ( java . lang . String str ) { count = str . length ( ) ; value = new char [ count + INITIAL_CAPACITY ] ; str . getChars ( 0 , count , value , 0 ) ; }
constructs a string buffer so that it represents the same sequence of characters as the string argument ; in other words , the initial contents of the string buffer is a copy of the argument string . the initial capacity of the string buffer is 16 plus the length of the string argument . str - the initial contents of the buffer .
