java - Issue converting array to array list -

trying write java code single row battleship style game, , when tried convert array arraylist, game started returning "miss" no matter what.

public class simpledotcomgame {     public static void main(string[] args) {         int numofguess = 0;         scanner sc = new scanner(system.in);         simpledotcom dot = new simpledotcom();         int rannum = (int) (math.random() * 5);         arraylist<integer> locations = new arraylist<integer>();         locations.add(rannum);         locations.add(rannum + 1);         locations.add(rannum + 2);         dot.setlocationcells(locations); //think you're running             // separate program parameters set cells "locations"         boolean isalive = true;         while (isalive == true) {             system.out.println("enter number");             string userguess = sc.next();             string result = dot.checkyourself(userguess); //run program                 // check if cells hit userguess             numofguess++;             if (result.equals("kill")) {                 isalive = false;                 system.out.println("you took " + numofguess + " guesses");             }         }         sc.close();     } } 

public class simpledotcom {     int numofhits = 0;     arraylist<integer> locationcells;     public void setlocationcells(arraylist<integer> locations) { //locations             // variable described array must define array         locationcells = locations;     }     public string checkyourself(string userguess) { //check using parameter userguess         int guess = integer.parseint(userguess);         string result = "miss";         int index = locationcells.indexof(userguess);         if (index >= 0) {             locationcells.remove(index);             if (locationcells.isempty()) {                 result = "kill";             } else {                 result = "hit";             }         }         system.out.println(result);         return result;     } } 

change :

int index = locationcells.indexof(userguess); 

to

int index = locationcells.indexof(guess); 

userguess string can not possibly in list of integers. guess int can.