Question

I’m trying to turn an array of inputed integers to a vector, then output the result. I’ve searched google and every example uses the ” (Arrays.asList(randomArray)”. However, when i try to compile i get a “cannot find symbol – constructor Vector(java.util.list)” what is the correct code to convert an array to a vector?

here is my code:

Scanner inputNumber = new Scanner(System.in);
System.out.println("How big would you like the vector to be?");
int vecSize = inputNumber.nextInt();
int [] vecArray = new int[vecSize];
int [] primeArray = new int[vecSize];
System.out.println("Please enter " + vecSize + " postive numbers please: ");

for (int i = 0; i < vecSize; i++)  {
    int arrayInput = inputNumber.nextInt();
    if (arrayInput > 0){
    vecArray[i] = arrayInput;
    }
}
Vector<Integer> arrayToVec = new Vector<Integer>(Arrays.asList(vecArray));

Answer 1

The problem is that you have an array of primitive type (int), which doesnt work well with Arrays.asList(). Arrays.asList(vecArray) actually returns a List<int[]> with one element (your array).

The easiest fix is to populate the vector yourself manually:

Vector<Integer> arrayToVec = new Vector<Integer>();
for (int i : vecArray) {
    arrayToVec.add(i);
}