Create

void Create (int n)
    {
        Random rand = new Random();
        ships = new PointShip[n];
        for (int x=0; x<n; x++) {
            do {
                ships[x].pos_x=rand.nextInt(10);
                ships[x].pos_y=rand.nextInt(10);
                if(CanPut(ships[x],n)) break;
            } while (true);
        }
    }
    boolean CanPut(PointShip ship, int n) {
        int repeat=0;
        for (int i=0; i<n; i++) {
            if (ships[i].pos_x==ship.pos_x && ships[i].pos_y==ship.pos_y) {
                repeat++;
            }
        }
        if (repeat>1) return false;
        else return true;
    }