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 : []
