creating array without declaring the size - java

Question

i\'ve digging around about the same issue but i couldn\'t find the same as i had

i want to create an array without declaring the size because i don\'t know how it w

Answer 1

As others have said, use ArrayList. Here's how:

public class t
{
 private List x = new ArrayList();

 public void add(int num)
 {
   this.x.add(num);
 }
}

As you can see, your add method just calls the ArrayList's add method. This is only useful if your variable is private (which it is).