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import java.util.HashMap;
public class Main {
public static void main(String[] args) {
HashMap<String,String> hMap = new HashMap<String,String>();
System.out.println("Size of HashMap : " + hMap.size());
hMap.put("1", "One");
hMap.put("2", "Two");
hMap.put("3", "Three");
System.out.println("Size of HashMap after addition : " + hMap.size());
// remove one element from HashMap
System.out.println(hMap.remove("2"));
}
}
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