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I'm trying to add numbers to an integer list but I'm receiving an error. Please refer my code

public class TstListofIntegers {

    public void testInteger() {
        List<Integer> listOfIntegers;

        for(Integer i=0;i<10;i++)
        {        
            listOfIntegers.add(i);
        }

        system.debug('listofIntegers'+listOfIntegers);
    }
}

Error: System.NullPointerException: Attempt to de-reference a null object

7

Initialize your list List<Integer> listOfIntegers = new List<Integer>();

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  • 2
    alright , feel free to accept answer if its working for you ! there will be ✓ sign at left side. – Nachiket Deshpande Jan 9 '18 at 16:11

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