Java Arraylist Clear() Function
What is an ArrayList?
Here, in the page we will discuss about the ArrayList’s clear() Method in java.
Arraylist is a part of collection framework in java. It contains some inbuilt function like clear() function which can be found in the java.util.ArrayList Package.It implements the List interface of the collections framework.
ArrayList clear Function:
Arraylist contains several inbuilt functions that are used to perform several operations on arraylist in Java. clear() function is also an inbuilt method of class ArrayList.
clear() method is used to clear a whole object of an arraylist.
Syntax:
arraylist_name.clear()
Definition of Parameters:
arrayList_name : This contains the name of the arraylist in which the functions have to be performed.
Example for Clearing ArrayList of String Type:
import java.util.*;
public class Main{
public static void main(String[] args){
// Initializing an ArrayList
ArrayList PrepInsta = new ArrayList<>();
// Adding elements to the ArrayList
PrepInsta.add("Lakshit");
PrepInsta.add("Rishikesh");
PrepInsta.add("Rishik");
// Printing the ArrayList
System.out.println("ArrayList: " + PrepInsta);
// invoking the clear function
PrepInsta.clear();
System.out.println("ArrayList: " + PrepInsta);
}
}
Output:
ArrayList: [Lakshit, Rishikesh, Rishik] ArrayList: []
Explanation:
In the above Program, we have created an arraylist PrepInsta containing its employees name and after invoking the clear() method the arraylist “PrepInsta” will remove all its elements and gets empty.
Example for Clearing ArrayList of Integer Type:
We can also clear the ArrayList of Integer type with the help of clear() function.
import java.util.*;
public class Main{
public static void main(String[] args){
// Initializing the new ArrayList
ArrayList Numbers = new ArrayList<>();
// Adding elements to the Arraylist
Numbers.add(1);
Numbers.add(2);
Numbers.add(3);
// Printing the ArrayList
System.out.println("ArrayList: " + Numbers);
// Invoking the clear function
Numbers.clear();
System.out.println("ArrayList: " + Numbers);
}
}
Output:
ArrayList: [1, 2, 3] ArrayList: []
Explanation:
In the above Example. we add 3 elements of integer type to an arraylist name “Numbers” and after invoking the clear() method the arraylist “PrepInsta” will remove all its elements and gets empty.
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