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: []
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