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Get the size of the IdentityHashMap in Java
To get the size of IdentityHashMap, use the size() method. It returns the count of elements in the IdentityHashMap.
Let us first create a IdentityHashMap and add some elements to it
Map<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);Now, get the size
m.size();
The following is an example to get the size of the IdentityHashMap
Example
import java.util.*;
public class Demo {
public static void main(String[] args) {
Map<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());
}
}The output is as follows
IdentityHashMap elements
{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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