How to assign int value to integer variable

Question

How can I convert an int value to integer value?

Here is my code-

private static int[] value= {R.drawable.collection1,R.drawable.collection2}

public static ArrayList<Integer> AddIntValue (int[] value){
    ArrayList<Integer> Intvalue=new ArrayList<Integer>();

    for(int i=0;i<value.length; i++)
    {
        Intvalue.add(Integer.valueOf(value[i]), null);
    }

    return Intvalue;
}

Am getting error on Intvalue.add(Integer.valueOf(value[i]), null);

Please help me

Thanks

You arraylist is empty, so adding at a specific position (which does not exist yet) will throw an exception. What are you trying to achieve? — assylias
– assylias, Commented Nov 17, 2012 at 12:15
No.I tryed Integer k=Integer.valueOf(value[i]); before Intvalue.add(Integer.valueOf(value[i]), null); then i found that K is not null k have value. — user834900
– user834900, Commented Nov 17, 2012 at 12:27
looking at one of your previous comments, you seem to mix R.integer and Integer. You should clarify what you want (in other words, what do you want the list to contain after that method). — assylias
– assylias, Commented Nov 17, 2012 at 12:47

BillThePlatypus · Accepted Answer · 2013-04-28 18:44:01Z

5

java 5 added autoboxing, so you should just be able to use this

int i=3;
Integer number=i;//number now equals 3

The reason you are getting an error is because you are using the array for indices and trying to add null at this indices. If you array was {100,101,102}, It would try to add null to intValues at index 100, 101, and 102, which don't exist, giving you the IndexOutOfBoundsEception;

edited Apr 28, 2013 at 18:44

answered Nov 17, 2012 at 15:58

BillThePlatypus

4023 silver badges14 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

greendraco · Accepted Answer · 2012-11-17 12:49:12Z

0

If you want to use your code and still has control over elements list index, you have to: 1. Initzialize ArrayList size 2. Use correctly add method

public static List<Integer> addIntValue(int[] value) {
    List<Integer> intValues = new ArrayList<Integer>(value.length);

    for (int i = 0; i < value.length; i++) {
        intValues.add(i, value[i]);
    }

    return intValues;
}

answered Nov 17, 2012 at 12:49

greendraco

4883 silver badges13 bronze badges

Collectives™ on Stack Overflow

How to assign int value to integer variable

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related