The clone() method of java.util.concurrent.ConcurrentSkipListMap is an in-built function in Java which returns a shallow copy of this ConcurrentSkipListMap instance. The keys and values themselves are not cloned.
Syntax:
ConcurrentSkipListMap.clone()
Parameter: The function does not accept any parameter.
Parameter: This method do not accepts any parameter.
Return Value: The function returns a shallow copy of this ConcurrentSkipListMap.
Below programs illustrate the above method:
Program 1:
// Java Program Demonstrate clone()// method of ConcurrentSkipListMap import java.util.concurrent.ConcurrentSkipListMap; class GFG { public static void main(String[] args) { // Initializing the map // using ConcurrentSkipListMap() ConcurrentSkipListMap<Integer, Integer> mpp = new ConcurrentSkipListMap<Integer, Integer>(); // Adding elements to this map mpp.put(1, 1); mpp.put(5, 2); mpp.put(2, 7); // Printing the ConcurrentSkipListMap System.out.println("Map: " + mpp); // Cloning the ConcurrentSkipListMap ConcurrentSkipListMap<Integer, Integer> clone_mpp = mpp.clone(); // Adding elements to the clone map clone_mpp.put(7, 9); System.out.println("Cloned map is: " + clone_mpp); }} |
Output:
Map: {1=1, 2=7, 5=2}
Cloned map is: {1=1, 2=7, 5=2, 7=9}
Program 2:
// Java Program Demonstrate clone()// method of ConcurrentSkipListMap import java.util.concurrent.ConcurrentSkipListMap; class GFG { public static void main(String[] args) { // Initializing the map // using ConcurrentSkipListMap() ConcurrentSkipListMap<Integer, Integer> mpp = new ConcurrentSkipListMap<Integer, Integer>(); // Adding elements to this map mpp.put(10, 5); mpp.put(54, 20); mpp.put(2, 7); // Printing the ConcurrentSkipListMap System.out.println("Map: " + mpp); // Cloning the ConcurrentSkipListMap ConcurrentSkipListMap<Integer, Integer> clone_mpp = mpp.clone(); // Adding elements to the clone map clone_mpp.put(17, 9); System.out.println("Cloned map is: " + clone_mpp); }} |
Output:
Map: {2=7, 10=5, 54=20}
Cloned map is: {2=7, 10=5, 17=9, 54=20}
Reference: https://docs.oracle.com/javase/9/docs/api/java/util/concurrent/ConcurrentSkipListMap.html#clone–
