AbstractList clear() method in Java with Examples

The clear() method of java.util.AbstractList class is used to remove all of the elements from this list. The list will be empty after this call returns.

Syntax:

public void clear()

Returns Value: This method does not return anything.

Below are the examples to illustrate the clear() method.

Example 1:

// Java program to demonstrate
// clear() method
// for String value

import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {

        try {

            // Creating object of AbstractList<String>
            AbstractList<String>
                arrlist1 = new ArrayList<String>();

            // Populating arrlist1
            arrlist1.add("A");
            arrlist1.add("B");
            arrlist1.add("C");
            arrlist1.add("D");
            arrlist1.add("E");

            // print the ArrayList
            System.out.println("Original ArrayListlist : "
                               + arrlist1);

            // Removing all the elements
            // using clear() method
            arrlist1.clear();

            // print the new ArrayList
            System.out.println("New ArrayList : "
                               + arrlist1);
        }

        catch (NullPointerException e) {
            System.out.println("Exception thrown : "
                               + e);
        }
    }
}

Output:

Original ArrayListlist : [A, B, C, D, E]
New ArrayList : []

Example 2:

// Java program to demonstrate
// clear() method
// for Integer value

import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {

        try {

            // Creating object of AbstractList<Integer>
            AbstractList<Integer>
                arrlist1 = new ArrayList<Integer>();

            // Populating arrlist1
            arrlist1.add(10);
            arrlist1.add(20);
            arrlist1.add(30);
            arrlist1.add(40);
            arrlist1.add(50);

            // print the ArrayList
            System.out.println("Original ArrayListlist : "
                               + arrlist1);

            // Removing all the elements
            // using clear() method
            arrlist1.clear();

            // print the new ArrayList
            System.out.println("New ArrayList : "
                               + arrlist1);
        }

        catch (NullPointerException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

Original ArrayListlist : [10, 20, 30, 40, 50]
New ArrayList : []