Java IdentityHashMap - isEmpty() Method
The java.util.IdentityHashMap.isEmpty() method is used to check whether this identity hash map contains no key-value mappings. It returns true if this map contains no mapping, else returns false.
Syntax
public boolean isEmpty()
Parameters
No parameter is required.
Return Value
Returns true if this identity hash map contains no key-value mappings.
Exception
NA
Example:
In the example below, the java.util.IdentityHashMap.isEmpty() method is used to check whether the given identity hash map is empty or not.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a identity hash map
IdentityHashMap<Integer, String> MyMap = new IdentityHashMap<Integer, String>();
//checking for empty
System.out.println("Is MyMap empty?: "+ MyMap.isEmpty());
//populating the map
MyMap.put(101, "John");
MyMap.put(102, "Marry");
MyMap.put(103, "Kim");
MyMap.put(104, "Jo");
//checking for empty
System.out.println("Is MyMap empty?: "+ MyMap.isEmpty());
}
}
The output of the above code will be:
Is MyMap empty?: true Is MyMap empty?: false
❮ Java.util - IdentityHashMap
