The higher(E e) method of java.util.concurrent.ConcurrentSkipListSet is an in-built function in Java which returns the least element in this set strictly greater than the given element, or null if there is no such element.
Syntax:
public E higher(E e)
Parameter: The function accepts a single parameter e i.e the value to match
Return Value: The function returns the least element greater than e, or null if there is no such element.
Exception: The function throws the following exceptions:
Below programs illustrate the ConcurrentSkipListSet.higher(E e) method:
Program 1:
// Java program to demonstrate higher() // method of ConcurrentSkipListSet import java.util.concurrent.*;
class ConcurrentSkipListSetHigherExample1 {
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);
// Finding higher of 20 in the set
System.out.println( "The higher of 20 in the set: "
+ Lset.higher( 20 ));
// Finding higher of 39 in the set
System.out.println( "The higher of 39 in the set: "
+ Lset.higher( 39 ));
// Finding higher of 50 in the set
System.out.println( "The higher of 50 in the set: "
+ Lset.higher( 50 ));
}
} |
The higher of 20 in the set: 30 The higher of 39 in the set: 40 The higher of 50 in the set: null
Program 2: Program to show NullPointerException in higher().
// Java program to demonstrate higher() // method of ConcurrentSkipListSet import java.util.concurrent.*;
class ConcurrentSkipListSetHigherExample1 {
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);
try {
// Trying to find higher of "null" in the set
System.out.println( "The higher of null in the set: "
+ Lset.higher( null ));
}
catch (Exception e) {
System.out.println( "Exception: " + e);
}
}
} |
Exception: java.lang.NullPointerException
Reference:
https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#higher-E-