Question

Little problem.. i want to add some arrays to my arraylist and later get acces to print them out.
Her is my code..

 import java.util.*;
 class List
{
 private ArrayList<int[]> X;
 private int[] list;

public X()
{
    X = new ArrayList<int[]>();
}

public void addList(int[] list)
{
     this.X.add(list);
}

public void showList(int listNumber)
{
    System.out.println(X.get(listNumber));
}

Problem is im not getting my list out, but the int code something … dunno what it really is..

Answer 1

This is because arrays toString() which is called here prints out array reference, not it’s contents.

Use instead custom output:

    for (int i : X.get(listNumber))
        System.out.print(i + " ");

Or, as AlexR proposed, better use provided JDK method Arrays.toString();

By the way, you don’t need to prefix this. everywhere in your class’ code.