public class stringparm
{
   public static void alterstring(String str)
   {
      // Creates new instance. Does not replace
      // characters of existing object.
      str = "String from alterstring() method!";
      
      System.out.println("str = " + str);
   }
   
   public static void main(String[] args)
   {
      String s;
      
      s = "String from main() method.";
      System.out.println("s = " + s);
      
      alterstring(s);
      
      System.out.println("s = " + s);
   }
}