How do I create a Hashtable and iterates its contents?

The code snippet shows you how to create and instance of Hashtable that stores Integer values using a String keys. After that we iterates the elements of the Hashtable using the Enumeration interface.

package org.kodejava.example.util;

import java.util.Enumeration;
import java.util.Hashtable;

public class HashtableDemo {
    public static void main(String[] args) {
        // Creates an instance of Hashtable
        Hashtable<String, Integer> numbers = new Hashtable<>();
        numbers.put("one", 1);
        numbers.put("two", 2);
        numbers.put("three", 3);

        // Returns an enumeration of the keys in this Hashtable
        Enumeration<String> keys = numbers.keys();
        while (keys.hasMoreElements()) {
            // Returns the next element of this enumeration if this
            // enumeration object has at least one more element to
            // provide
            String key = keys.nextElement();
            System.out.printf("Key: %s, Value: %d%n", key, numbers.get(key));
        }
    }
}

Wayan

Programmer, runner, recreational diver, live in the island of Bali, Indonesia. Mostly programming in Java, Spring Framework, Hibernate / JPA. Support me by donating.

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