Method( double R, double P){
 
   P = R*P*(1-P);
 
   return P;
}

public int Malthusian {
   double saveP;
   double newP;
   boolean bflag = true;
   int returnVal = 0; // Initial value
 
   // Assuming nano's method above returns a double: 
   saveP = Method(5,1);
   while(bflag) {
      newP = Method(5,saveP);
      if (newP == saveP) {
         // Stable (do what you need to return this.)
         returnVal = 1;  // Arbitrary value to denote Stable
         bflag = false;
      }
      if (P == 0) {
         // Extinct (do what you need to return this.)
         returnVal = 2;  // Arbitrary value to denote Extinct
         bflag = false;
      }
      return returnVal;  // Return the value
   }
}