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);
}
} |
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);
}
} |
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–