Java Collection Tutorial - Java Dictionary.isEmpty()


Dictionary.isEmpty() has the following syntax.

public abstract boolean isEmpty()


In the following code shows how to use Dictionary.isEmpty() method.

import java.util.*;
//from w  w  w.  ja  v  a 2s.  c o m
public class Main {

   public static void main(String[] args) {
      Dictionary d = new Hashtable();
    // add elements in the hashtable
      d.put("1", "from");
      d.put("2", "Cocoa");
      d.put("5", "Coffee");
      // return true if this dictionary maps no keys to value.
      boolean b = d.isEmpty();
      System.out.println("Dictionary is empty:" + b);

The code above generates the following result.