access elements in array of arraylist

Question

I am printing an array of arraylist which contains 2d array.

ArrayList<ArrayList<ArrayList<Array>>> sols;

I am trying to print this:

System.out.print(sols.get(0).get(0).get(0));

was expecting a 2d array as it was the lowest level of the variable

I get this instead

app.Array@42037252

How can I print the specified 2d array?

EDIT

this is my Array class

public class Array {
    int[][] array;
    public Array(int[][] initialArray){
         array = initialArray;
    }
}

You're not being very specific about the case.. How do you want to store a solution in an array? — moffeltje
– moffeltje, Commented May 19, 2015 at 12:40
The class app.Array does not implement toString() so the default Object's toString is being called and "class@hexhashcode" is being printed. Did you write the "Array" class? — FriedSaucePots
– FriedSaucePots, Commented May 19, 2015 at 14:15

davioooh · Accepted Answer · 2015-05-19 14:32:59Z

1

The string you are getting is the default representation of your Array object provided by Object.toString() method.

I suppose app.Array is a custom class implemented by you.

So to print out your 2d array in a more intuitive way you need to override the toString() method in your class.

For example:

@Override
public String toString(){
    return Arrays.deepToString(array);
}

answered May 19, 2015 at 14:19

davioooh

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