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Return a shallow copy of IdentityHashMap in Java
Returning a shallow copy means to copy elements of one IdentityHashMap to another. For this, clone() method is used.
The following is an example to return a shallow copy of IdentityHashMap
Example
import java.util.*;
public class Demo {
public static void main(String[] args) {
IdentityHashMap<String, Integer> m = newIdentityHashMap<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());
0System.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
Updated on: 30-Jul-2019
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