converting array into arraylist

Currently i have:

Code java:

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int[] test = {1,2,3,4,5};
ArrayList<Integer> ar = new ArrayList<Integer>(Arrays.asList(test));

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this gives me the error:

Code :

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error: no suitable constructor found for ArrayList(List<int[]>)
        ArrayList<Integer> ar = new ArrayList<Integer>(Arrays.asList(test));
                                ^
    constructor ArrayList.ArrayList(Collection<? extends Integer>) is not applicable
      (actual argument List<int[]> cannot be converted to Collection<? extends Integer> by method invocation conversion)
    constructor ArrayList.ArrayList() is not applicable
      (actual and formal argument lists differ in length)
    constructor ArrayList.ArrayList(int) is not applicable
      (actual argument List<int[]> cannot be converted to int by method invocation conversion)
1 error

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What i want to do is make a method that takes an array as parameter and returns an arraylist with the same elements.

See the API for Arrays.asList...it accepts an array of objects - not primitives (in many cases the compiler is smart enough to interchange through something called autoboxing - in this case not). Using a simple loop you can add the items of the array to the List.

bleh, thanks anyway

Create the method yourself. Just iterate through the array and return the elements in a new list.

Code Java:

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public ArrayList<T> arrayToArrayList(<T> array)
{
     ArrayList<T> list = new ArrayList<T>();
     for(int i=0; i<array.length; i++)
          list.add(array[i]);
     return list;
}

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Quote:

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Originally Posted by Harry Blargle

What i want to do is make a method that takes an array as parameter and returns an arraylist with the same elements.

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Then do what kenster421 said. Iterate through the array and add it all to the ArrayList.

One small fix though. Make the parameter an "E" array. (E[] array)

Code :

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public ArrayList<E> test(E[] array) {
    //Iterating code
}

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Be careful when using generic types with plain arrays though. They hold primitives as well as objects, which can cause problems.

Quote:

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Originally Posted by bgroenks96

Then do what kenster421 said. Iterate through the array and add it all to the ArrayList.

One small fix though. Make the parameter an "E" array. (E[] array)

Code :

---

public ArrayList<E> test(E[] array) {
    //Iterating code
}

---

Be careful when using generic types with plain arrays though. They hold primitives as well as objects, which can cause problems.

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Whoops, thanks for the clarification.

Hi,
You have to use:
Integer[] test for this.

bean factory