Dictionary size() Method in Java with Examples
Last Updated :
27 Dec, 2018
The size() Method of Dictionary class in Java is used to know the size of the dictionary or the number of distinct keys present in the dictionary.
Syntax:
DICTIONARY.size()
Parameters:
The method does not accept any parameters.
Return Value:
The method returns the number of keys present in the dictionary.
Below programs illustrate the size() Method of Dictionary:
Program 1:
import java.util.*;
public class Dictionary_Demo {
public static void main(String args[])
{
Dictionary<Integer, String> dict
= new Hashtable<Integer, String>();
dict.put( 10 , "Geeks" );
dict.put( 15 , "4" );
dict.put( 10 , "Geeks" );
dict.put( 25 , "Welcomes" );
dict.put( 30 , "You" );
System.out.println( "Dictionary: " + dict);
System.out.println( "The size of the dictionary is "
+ dict.size());
}
}
|
Output:
Dictionary: {10=Geeks, 30=You, 15=4, 25=Welcomes}
The size of the dictionary is 4
Program 2:
import java.util.*;
public class Dictionary_Demo {
public static void main(String args[])
{
Dictionary<String, Integer> dict
= new Hashtable<String, Integer>();
dict.put( "Geek" , 10 );
dict.put( "4" , 15 );
dict.put( "Geeks" , 20 );
dict.put( "Welcomes" , 25 );
dict.put( "You" , 30 );
System.out.println( "Dictionary: " + dict);
System.out.println( "The size of the dictionary is "
+ dict.size());
}
}
|
Output:
Dictionary: {You=30, Welcomes=25, 4=15, Geeks=20, Geek=10}
The size of the dictionary is 5
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