How to increase the size of an array in Java?

Question

I want to store as many elements as desired by the user in an array. But how do I do it.

If I were to create an array, I must do so with a fixed size. Every time a

Answer 1

public class IncreaseArraySize {
 public static void main(String[] args) {
    int arr[] = new int[5];
      for (int i = 0; i < arr.length; i++) {
            arr[i] = 5;
      }
      for (int i = 0; i < arr.length; i++) {
            System.out.print(arr[i] + " ");
      }
       System.out.println(" ");
       System.out.println("Before increasing Size of an array :" + arr.length);


        int arr2[] = new int[10];

        arr = arr2;
        arr2 = null;
        for (int i = 0; i < arr.length; i++) {
        System.out.print(arr[i] + " ");
    }
    System.out.println("");
    System.out.println("After increasing Size of an array : " + arr.length);
}
}