Java IdentityHashMap - clone() Method
The java.util.IdentityHashMap.clone() method returns a shallow copy of this identity hash map instance: the keys and values themselves are not cloned.
Syntax
public Object clone()
Parameters
No parameter is required.
Return Value
Returns a shallow copy of this map.
Exception
NA.
Example:
In the example below, the java.util.IdentityHashMap.clone() method returns a shallow copy of the given map.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a identity hash map
IdentityHashMap<Integer, String> Map1 = new IdentityHashMap<Integer, String>();
//populating Map1
Map1.put(101, "John");
Map1.put(102, "Marry");
Map1.put(103, "Kim");
Map1.put(104, "Jo");
//print the content of Map1
System.out.println("Map1 contains: "+ Map1);
//create a copy of Map1 into Object Map2
Object Map2 = Map1.clone();
//print the content of Map2
System.out.print("Map2 contains: "+ Map2);
}
}
The output of the above code will be:
Map1 contains: {101=John, 102=Marry, 104=Jo, 103=Kim}
Map2 contains: {101=John, 102=Marry, 104=Jo, 103=Kim}
❮ Java.util - IdentityHashMap
