Remove element from Vector(any collection) in JAVA

How to remove element from an Integer type Vector in JAVA by using remove(Object o)?
This is a short snippet of what I did. I’m new to Java.

    Vector<Integer> v = new Vector<>();

    v.add(1);
    v.add(2);
    v.add(3);

    Object remInd = v.remove(0);    // Index based, THIS WORKS!!!
        
    boolean remElem = v.remove("3");    // HOW TO MAKE THIS WORK? IT ALWAYS RETURNS 'false'


        // I tried this, it works.

    Object num = 3;
        
    boolean remElem = v.remove(num);    // returns 'true'

>Solution :

In one you are trying to remove a String but the collection contains integers:

v.remove("3");

An option could be if you want to convert a String to the value:

v.remove(Integer.parseInt("3"));

But this is also an excellent example of why Autoboxing can cause problems. What should happen here, remove 2nd element at index 1 or remove 1st element with value 1?

v.remove(1);

Doing this makes it very clear that Integer type a the value should be removed:

v.remove(Integer.valueOf(1));