The clear() method of java.util.LinkedHashSet class is used to remove all of the elements from this set. The set will be empty after this call returns.
Syntax:
public void clear()
Return 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 Integer value  import java.util.*;  public class GFG1 {    public static void main(String[] argv) throws Exception    {        try {              // Create the object of LinkedHashSet<Integer>            LinkedHashSet<Integer>                linkset = new LinkedHashSet<Integer>();              // populate hash set            linkset.add(10);            linkset.add(20);            linkset.add(30);              // print the LinkedHashSet            System.out.println("LinkedHashSet: "                               + linkset);              // clear set values            // using clear() method            linkset.clear();              // print the LinkedHashSet            System.out.println("LinkedHashSet after "                               + "use of clear() method: "                               + linkset);        }          catch (NullPointerException e) {              System.out.println("Exception thrown : " + e);        }    }} |
Output:
LinkedHashSet: [10, 20, 30] LinkedHashSet after use of clear() method: []
Example 2:
// Java program to demonstrate// clear() method// for String value  import java.util.*;  public class GFG1 {    public static void main(String[] argv) throws Exception    {        try {              // Create the object of LinkedHashSet<Integer>            LinkedHashSet<String>                linkset = new LinkedHashSet<String>();              // populate hash set            linkset.add("A");            linkset.add("B");            linkset.add("C");              // print the LinkedHashSet            System.out.println("LinkedHashSet: "                               + linkset);              // clear set values            // using clear() method            linkset.clear();              // print the LinkedHashSet            System.out.println("LinkedHashSet after "                               + "use of clear() method: "                               + linkset);        }          catch (NullPointerException e) {              System.out.println("Exception thrown : " + e);        }    }} |
Output:
LinkedHashSet: [A, B, C] LinkedHashSet after use of clear() method: []
