ArrayList.clear() in Java

ArrayList.clear(): This method is available in java.util.ArrayList class of Java.

Syntax:

void java.util.ArrayList.clear()

This method removes all of the elements from this list. The list will be empty after this call returns.

Parameters: NA

Exceptions: NA

Approach

Java

import java.util.ArrayList;

public class ArrayListclear {
    public static void main(String[] args) {
        ArrayList<Integer> arr = new ArrayList<>();
        arr.add(1);
        arr.add(2);
        arr.add(3);

        System.out.println("Size before clear " + arr.size());
        arr.clear();

        System.out.println("Size after clear " + arr.size());
    }
}

Output:

Size before clear 3

Size after clear 0