Rush hour: array overwriting

[MatthijsJava]

package Model;

import java.util.ArrayList;

public class Field {
private Car[][] field = new Car[6][6];
private int score = 0;
private boolean isGewonnen;

public Field(Car[][] field) {
this.field = field;
}

public Car[][] getField() {
return field;
}

public int getScore() {
return score;
}

public void moveCar(int carNumber, RichtingVerplaatsen richting) {
Car car = null;
for(int i = 0; i < 6; i++) {
for(int j = 0; j < 6; j++) {
if(field[i][j] != null) {
if(field[i][j].getCarNumber() == carNumber) {
car = field[i][j];
}

}
}
}

if(car != null) {
ArrayList<int[]> locations = new ArrayList<int[]>();
Richting richtingAuto = car.getRichting();
for(int i = 0; i < 6; i++) {
for(int j = 0; j < 6; j++) {
if(car == field[i][j]) {
locations.add(new int[]{i, j});
}
}
}


if(richting == RichtingVerplaatsen.RECHTS && car.getRichting() == Richting.HORIZONTAAL && locations.get(0)[1] < 6 - car.getLengte() ) {
for (int[] location : locations) {
field[location[0]][location[1]] = null;
}

for (int[] location : locations) {
field[location[0]][location[1] + 1] = car;
}

score++;
}

When I'm testing the console application. The user gets asked what car he wants to move and in what direction. But when I move the car to a different location, it overwrites the array even if there is a car already in that specific location.
Someone please help.

[foulkelore]

Welcome!! Hey can you try using the coding tags. It really done help make the post readable.

[Tolls]

And when you've added [code] tags [/code] so that we can read your code, stick some debugging in the moveCar method so you can see what the value of everything is, and see what route through the code it is taking.