Java Dictionary - size() Method
The java.util.Dictionary.size() method returns the number of entries (distinct keys) in this dictionary.
Syntax
public abstract int size()
Parameters
No parameter is required.
Return Value
Returns the number of keys in this dictionary.
Exception
NA
Example:
In the example below, the java.util.Dictionary.size() method is used to find the number of keys in the given dictionary.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a dictionary
Dictionary<Integer, String> Dict =
new Hashtable<Integer, String>();
//populating dictionary
Dict.put(101, "John");
Dict.put(102, "Marry");
Dict.put(103, "Kim");
//printing size of the dictionary
System.out.println("Number of keys in Dict: " + Dict.size());
//Adding two more keys in the dictionary
Dict.put(104, "Sam");
Dict.put(105, "Jo");
//printing size of the dictionary
System.out.println("Number of keys in Dict: " + Dict.size());
}
}
The output of the above code will be:
Number of keys in Dict: 3 Number of keys in Dict: 5
❮ Java.util - Dictionary
