The java.util.concurrent.ConcurrentSkipListSet.clear() method is an in-built function in Java which removes all the elements from this set.
Syntax:
ConcurrentSkipListSet.clear()
Parameters: The function does not accept any parameter.
Return Value: The function does not return anything.
Below programs illustrate the ConcurrentSkipListSet.clear() method:
Program 1:
/* Java Program Demonstrate clear() method of ConcurrentSkipListSet() */ import java.util.concurrent.*;
class ConcurrentSkipListSetClearExample1 {
public static void main(String[] args)
{
// Creating a set object
ConcurrentSkipListSet<Integer> Lset =
new ConcurrentSkipListSet<Integer>();
// Adding elements to this set
for ( int i = 10 ; i <= 50 ; i += 10 )
Lset.add(i);
// Printing elements of the set
System.out.println( "The set contains: " + Lset);
// Clear the set
Lset.clear();
// Printing elements of the set after clear operation
System.out.println( "After clear operation the set contains: " + Lset);
}
} |
Output:
The set contains: [10, 20, 30, 40, 50] After clear operation the set contains: []
Program 2:
/* Java Program Demonstrate clear() method of ConcurrentSkipListSet() */ import java.util.concurrent.*;
class ConcurrentSkipListSetClearExample2 {
public static void main(String[] args)
{
// Creating a set object
ConcurrentSkipListSet<String> Lset =
new ConcurrentSkipListSet<String>();
// Adding elements to this set
Lset.add( "alex" );
Lset.add( "bob" );
Lset.add( "chuck" );
Lset.add( "drake" );
Lset.add( "eric" );
// Printing elements of the set
System.out.println( "The set contains: " + Lset);
// Clear the set
Lset.clear();
// Printing elements of the set after clear operation
System.out.println( "After clear operation the set contains: " + Lset);
}
} |
Output:
The set contains: [alex, bob, chuck, drake, eric] After clear operation the set contains: []
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#clear–