The LinkedHashSet.clear()
method in Java is used to remove all elements from a LinkedHashSet
.
Table of Contents
- Introduction
clear
Method Syntax- Examples
- Clearing Elements from a LinkedHashSet
- Checking if the LinkedHashSet is Empty
- Conclusion
Introduction
The LinkedHashSet.clear()
method is a member of the LinkedHashSet
class in Java. It allows you to remove all elements from a LinkedHashSet
, leaving it empty.
clear Method Syntax
The syntax for the clear
method is as follows:
public void clear()
- The method does not take any parameters.
- The method does not return any value.
Examples
Clearing Elements from a LinkedHashSet
The clear
method can be used to remove all elements from a LinkedHashSet
.
Example
import java.util.LinkedHashSet;
public class ClearExample {
public static void main(String[] args) {
// Creating a LinkedHashSet of Strings
LinkedHashSet<String> animals = new LinkedHashSet<>();
// Adding elements to the LinkedHashSet
animals.add("Lion");
animals.add("Tiger");
animals.add("Elephant");
// Printing the LinkedHashSet
System.out.println("LinkedHashSet before clear: " + animals);
// Clearing all elements from the LinkedHashSet
animals.clear();
// Printing the LinkedHashSet after clear
System.out.println("LinkedHashSet after clear: " + animals);
}
}
Output:
LinkedHashSet before clear: [Lion, Tiger, Elephant]
LinkedHashSet after clear: []
Checking if the LinkedHashSet is Empty
After using the clear
method, you can check if the LinkedHashSet
is empty using the isEmpty
method.
Example
import java.util.LinkedHashSet;
public class IsEmptyExample {
public static void main(String[] args) {
// Creating a LinkedHashSet of Strings
LinkedHashSet<String> animals = new LinkedHashSet<>();
// Adding elements to the LinkedHashSet
animals.add("Lion");
animals.add("Tiger");
animals.add("Elephant");
// Clearing all elements from the LinkedHashSet
animals.clear();
// Checking if the LinkedHashSet is empty
boolean isEmpty = animals.isEmpty();
// Printing the result
System.out.println("Is the LinkedHashSet empty? " + isEmpty);
}
}
Output:
Is the LinkedHashSet empty? true
Conclusion
The LinkedHashSet.clear()
method in Java provides a way to remove all elements from a LinkedHashSet
. By understanding how to use this method, you can efficiently manage collections by resetting them to an empty state when necessary. The method ensures that the LinkedHashSet
is emptied, allowing for reuse or reinitialization.