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–
