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Java ArrayList Clear or Remove All Elements

Submitted by Deepthi on Sat, 11/13/2010 - 18:46

This Java ArrayList Clear or Remove all elements example shows how to remove all elements from an ArrayList using clear method.

import java.util.ArrayList;
 
//Java ArrayList Clear or Remove All Elements
 
public class JavaClearArrayList {
    public static void main(String args[]){
       
        //create new ArrayList
        ArrayList<String> alistNumbers = new ArrayList<String>();
        alistNumbers.add("1");
        alistNumbers.add("2");
        alistNumbers.add("3");
       
        System.out.println("ArrayList before clear or remove all: " + alistNumbers);
       
        /*
         * To clear or remove all elements of Java ArrayList use,
         * void clear() method of Java ArrayList class.
         */
       
        //remove all elements of ArrayList
        alistNumbers.clear();
       
        System.out.println("ArrayList after clear or remove all: " + alistNumbers);
    }
}
 
/*
Output of above given Java ArrayList clear or Remove all example would be
ArrayList before clear or remove all: [1, 2, 3]
ArrayList after clear or remove all: []
*/