java - string cannot be resolved to a type -

i getting "string cannot resolved type" error in code.

public class main {    public static void main(string[] args) {   // todo auto-generated method stub   formletter template;   template = new formletter();   template.print();   template.composeformletter(sean, colbert, god);   template.print();   }  }  class formletter  {   public void print(){     system.out.println(to + candidate + from);    }      public void composeformletter(string t, string c, string f){     = t;    candidate = c;     = f;   }     private string to;    private string candidate;    private string from;    } 

string capitalized in java. cannot use lowercase string. (that's c#)

side question:
how following compiling @ all?

template.composeformletter(sean, colbert, god);