incompatible types found : void, was ist falsch?

Ich bin versucht, zu schreiben eine Klasse, finden die nächsten zwei Vektoren und eine Summe.

Habe ich zu verstehen versucht, so hart aber ich kann nicht herausfinden, der Grund, warum ich diese Nachricht bekommen, es ist der einzige Fehler, den ich bekommen:

java:93: inkompatible Typen
gefunden : void
erforderlich: EDU.gatech.cc.ist.util.Vec2
Ergebnis = eins.add(zwei);
^

Zeile 93 ist am Ende der code, habe ich einige Pfeile zeigen es!

enter code here


package EDU.gatech.cc.is.clay;


import java.util.*;
import EDU.gatech.cc.is.clay.*;
import java.lang.*;
import EDU.gatech.cc.is.abstractrobot.*;
import EDU.gatech.cc.is.util.Vec2;
import EDU.gatech.cc.is.util.Units;


public class MAX_go_in_between extends NodeVec2
{
  public static final boolean DEBUG = /*true;*/ Node.DEBUG;
  private SocSmall abstract_robot;


  public MAX_go_in_between(SocSmall ar)
  {
    abstract_robot = ar;


  }

  long last_spott = 0;
  Vec2 result = new Vec2();



  public Vec2 Value(long timestamp)
  {


    if (DEBUG) System.out.println("MAX_Avoid_walls: Value()");

    if ((timestamp > last_spott) || (timestamp == -1))
    {
      if (timestamp != -1) last_spott = timestamp;


      Vec2 one;
      Vec2 two;

      //array of Vec2 of all the opponents
      Vec2[] list_opp = abstract_robot.getOpponents(timestamp);
      //empty array of vec2 where will be put the opponents in front of the robot
      ArrayList<Vec2> list_opp_in_front;

      Vec2 temp;


      //find which opponents are in front and put them in the arraylist
      for(int i=0; i<list_opp.length; i++)
      {
        temp = list_opp[i];

        if(temp.x >= 0.0)
        {
          list_opp_in_front.add(temp);
        }
      }

      //get closest opponent and sets it to index 0
      for(int i=1; i<list_opp_in_front.size()-1; i++)
      {
        temp = list_opp_in_front.get(i);

          if(list_opp_in_front.get(0).r<temp.r)
        {
          list_opp_in_front.set(i, list_opp_in_front.get(0));
          list_opp_in_front.set(0, temp);

        }
      }

      //get second closest opponent and sets it to index 1
      for(int i=2; i<list_opp_in_front.size()-1; i++)
      {
        temp = list_opp_in_front.get(i);

          if(list_opp_in_front.get(1).r<temp.r)
        {
          list_opp_in_front.set(i, list_opp_in_front.get(1));
          list_opp_in_front.set(1, temp);
        }

          //sum both vectors
          one = list_opp_in_front.get(0);
          two = list_opp_in_front.get(1);

 =============>>>>
 =============>>>>   result = one.add(two);
          }

      }

      return(result);
    }

  }



Here is the Vec2.add(Vec2) method:


 public void add(Vec2 other)
  {
  x = x + other.x;
  y = y + other.y;
  r = Math.sqrt(x*x + y*y);
  if (r > 0)
   t = Math.atan2(y,x);
  }