Remove all elements from Java ArrayList - Java Collection Framework

Introduction

To remove all elements from the ArrayList use void clear() method.

Demo Code

import java.util.ArrayList;

public class Main {

  public static void main(String[] args) {
    ArrayList arrayList = new ArrayList();

    arrayList.add("1");
    arrayList.add("2");
    arrayList.add("3");

    System.out.println("Size of ArrayList before removing elements : " + arrayList.size());

    arrayList.clear();//from  w w  w. j a  va 2  s  .c o m
    System.out.println("Size of ArrayList after removing elements : " + arrayList.size());

  }
}

Result

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