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Clone IdentityHashMap in Java
To clone the IdentityHashMap in Java, use the clone() method.
Create an IdentityHashMap and add elements to it −
IdentityHashMap<String, Integer> m = new IdentityHashMap<String, Integer>(); m.put("1", 100); m.put("2", 200); m.put("3", 300); m.put("4", 150); m.put("5", 110);
Now get the size of the IdentityHashMap −
m.size()
The following is an example to clone IdentityHashMap in Java −
Example
import java.util.*; public class Demo { public static void main(String[] args) { IdentityHashMap<String, Integer> m = new IdentityHashMap<String, Integer>(); m.put("1", 100); m.put("2", 200); m.put("3", 300); m.put("4", 150); m.put("5", 110); m.put("6", 50); m.put("7", 90); m.put("8", 250); m.put("9", 350); m.put("10", 450); System.out.println("IdentityHashMap elements
"+ m); System.out.println("Size = " + m.size()); System.out.println("
Cloned Map = " + m.clone()); System.out.println("Size = " + m.size()); } }
Output
IdentityHashMap elements {2=200, 4=150, 9=350, 7=90, 10=450, 6=50, 5=110, 8=250, 1=100, 3=300} Size = 10 Cloned Map = {2=200, 4=150, 9=350, 7=90, 10=450, 6=50, 5=110, 8=250, 1=100, 3=300} Size = 10
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