Clear a collection

void clear()
Removes all of the elements from this collection (optional operation).

import java.util.ArrayList;
import java.util.Collection;

public class Main {

  public static void main(String args[]) {
     Collection collection = new ArrayList();
     collection.add("java2s.com");
     
     System.out.println(collection);
     
     collection.clear();
     
     System.out.println(collection);
     
  }
}

The output: 


[java2s.com]
[]
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Collection:
  1. Collection interface
  2. Add elements to a collection
  3. Is it contained in the collection
  4. Compare two collections
  5. Remove elements from a collection
  6. Convert collection to Array
  7. Get the size of a Collection
  8. Is a collection empty
  9. Clear a collection
  10. Get the iterator() from a collection