The isEmpty() method of java.util.concurrent.ConcurrentSkipListMap is an in-built function in Java which returns boolean value that is it returns true if this map contains no key-value mappings otherwise false.
Syntax:
public boolean isEmpty()
Parameter: The function does not accepts any parameters.
Return Value: The function returns true if this map contains no key-value mappings or else false.
Below programs illustrate the above method:
Program 1:
// Java Program Demonstrate isEmpty()// method of ConcurrentSkipListMap  import java.util.concurrent.*;  class GFG {    public static void main(String[] args)    {          // Initializing the map        ConcurrentSkipListMap<Integer, Integer>            mpp = new ConcurrentSkipListMap<Integer,                                            Integer>();          // Adding elements to this map        for (int i = 1; i <= 5; i++)            mpp.put(i, i);          // checking if map is empty        System.out.println(mpp.isEmpty());    }} |
Output:
false
Program 2:
// Java Program Demonstrate isEmpty()// method of ConcurrentSkipListMap  import java.util.concurrent.*;  class GFG {    public static void main(String[] args)    {          // Initializing the map        ConcurrentSkipListMap<Integer, Integer>            mpp = new ConcurrentSkipListMap<Integer,                                            Integer>();          // checking if map is empty        System.out.println(mpp.isEmpty());    }} |
Output:
true
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListMap.html#isEmpty–
