Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        ArrayList<Integer> a = new ArrayList<>();
        a.add(1);
        a.add(5);
        a.add(1);

        a.set(1, null);
        System.out.println(a.get(1));
        System.out.println(a);
    }
}