LinkedHashSet clear() method in Java with Examples

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: []