Java Collection Tutorial - Java Dictionary.isEmpty()

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Syntax

Dictionary.isEmpty() has the following syntax.

public abstract boolean isEmpty()

Example

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 java2s.com");
      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.

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