Collection clear() method in Java with Examples

// Java program to demonstrate the
// usage of clear() method in ArrayList
import java.util.ArrayList;
import java.util.Arrays;

public class ClearMethodExample {
    public static void main(String[] args) {
        // Create an ArrayList and initialize it with some elements
        ArrayList<String> list = new ArrayList<>(Arrays.asList("1", "2", "3", "4"));

        // Display the list before clearing
        System.out.println("List before clearing: " + list);

        // Clear the list
        list.clear();

        // Display the list after clearing
        System.out.println("List after clearing: " + list);
    }
}

import java.io.*;
import java.util.*;

public class GFG {
    public static void main(String args[]) {

        // creating an empty LinkedList
        Collection<String> list = new LinkedList<>();

        // use add() method to add elements in the list
        list.add("Geeks");
        list.add("for");
        list.add("Geeks");

        // Output the present list
        System.out.println("The list is: " + list);

        // Clearing the LinkedList
        list.clear();

        // printing the new list
        System.out.println("The new List is: " + list);
    }
}

// Java code to illustrate clear() method
import java.util.*;

public class ArrayDequeDemo {
    public static void main(String args[])
    {
        // Creating an empty ArrayDeque
        Collection<String> de_que = new ArrayDeque<String>();

        // Use add() method to add elements into the Deque
        de_que.add("Welcome");
        de_que.add("To");
        de_que.add("Geeks");
        de_que.add("4");
        de_que.add("Geeks");

        // Displaying the ArrayDeque
        System.out.println("ArrayDeque: " + de_que);

        // Clearing the ArrayDeque
        de_que.clear();

        // printing the new ArrayDeque
        System.out.println("The new ArrayDeque is: "
                           + de_que);
    }
}

// Java code to illustrate clear() method
import java.io.*;
import java.util.*;

public class ArrayListDemo {
    public static void main(String[] args)
    {

        // create an empty array list with an initial capacity
        Collection<Integer> arrlist = new ArrayList<Integer>(5);

        // use add() method to add elements in the list
        arrlist.add(15);
        arrlist.add(20);
        arrlist.add(25);

        // prints all the elements available in list
        System.out.println("ArrayList: " + arrlist);

        // Clearing the ArrayList
        arrlist.clear();

        // printing the new ArrayList
        System.out.println("The new ArrayList is: "
                           + arrlist);
    }
}