Thread: Very confused

Hi, i have an issue where my programs output is returning false in comparison to the benchmark output for an assignment I'm doing (can be seen in attachment below), I was wondering if anyone knows what I did wrong?, I put a comment with // below on what I think went wrong but I'm still unsure why the method isChestUnlocked returning false, maybe instead of referring to jar1 in class ground, I have to refer to jar1, jar2 and 3 in class Chest instead?, if so how do I do this since the variables have to be private.

public class Stone
{
    private String name;
    private int weight;
 
    public Stone()[ATTACH=CONFIG]3655[/ATTACH][ATTACH=CONFIG]3655[/ATTACH]
    {
        System.out.print("Enter stone name: ");
        name = Global.keyboard.nextLine();
 
        System.out.print("Enter stone weight: ");
        weight = Global.keyboard.nextInt();
        Global.keyboard.nextLine();
    }
 
	public int getWeight()
	{
     	return weight;
	}
}
 
public class Jar
{
 
    private int position;
    private Stone stone;
 
 
    public Jar()
    {
        position = 0;
        stone = null;
    }
 
    public Jar(int initPos, Stone stone)
    {
        position = initPos;
        this.stone = stone;
    }
 
     public void move(int distance)
    {
       position = position + distance;
    }
 
    public void moveTo(Jar jar)
    {
        jar.stone = stone;
        stone = null;
    }
 
    public int getWeight() {
    if (stone == null) {
        return 0;
    }
    return stone.getWeight();
    }
 
public class Ground
{
    private Jar jar1;
    private Jar jar2;
    private Jar jar3;
    private Player player;
    private Chest chest;
    private Stone stone1;
    private Stone stone2;
    private Stone stone3;
 
    public Ground()
    {
      player = new Player();
 
      jar1 = new Jar(1, new Stone());
      jar2 = new Jar(2, new Stone());
      jar3 = new Jar(3, new Stone());
 
      chest = new Chest();
    }
 
   public boolean isChestUnlocked(){
    if (jar1.getWeight() + jar2.getWeight() + jar3.getWeight() == chest.combination) // I think this is the main problem
        return true;
    else
        return false;
 }
}
 
public class Chest
{
 
    public int combination;
    private int position = 4;
    private Jar jar1;
    private Jar jar2;
    private Jar jar3;
 
 
 
    public Chest()
    {
        System.out.print("Enter chest combination (5-10): ");
        combination = Global.keyboard.nextInt();
        Global.keyboard.nextLine();
 
 
        jar1 = new Jar(4, null);
        jar2 = new Jar(4, null);
        jar3 = new Jar(4, null);
 
    }
}

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