如何将int值分配给整数变量

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

Answer 1

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;

Answer 2

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;
}