Q:

Java program to remove all elements from an ArrayList

belongs to collection: Java ArrayList Programs

0

Given an ArrayList, and we have to remove/clear all elements using Java program.

ArrayList.clear()

This method is used to clear/remove all elements from an ArrayList.

In this program, we have 5 elements which have been added in the ArrayList, the elements are 100, 200, 300, 400 and 500. So, total numbers of elements are 5 and after removing all the elements ArrayList, total number of elements will be 0.

 

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Consider the program

import java.util.ArrayList;

public class RemoveAllElements{
	public static void main(String []args){
		//ArrayList object
		ArrayList arrList = new ArrayList();

		//Add elements to Arraylist
		arrList.add("100");
		arrList.add("200");
		arrList.add("300");
		arrList.add("400");
		arrList.add("500");

		System.out.println("Total number of elements in ArrayList: "
			+ arrList.size());
		//remove all elements using clear() method
		arrList.clear();
		System.out.println("Total number of elements in ArrayList: "
			+ arrList.size());
	}
}

Output

Total number of elements in ArrayList: 5
Total number of elements in ArrayList: 0

 

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