package org.kodejava.example.util;

import java.util.Hashtable;
import java.util.Random;

public class HashtableGetRandom {
    public static void main(String[] args) {
        //
        // Create a hashtable and put some key-value pair.
        //
        Hashtable colors = new Hashtable();
        colors.put("black", "#000");
        colors.put("red", "#f00");
        colors.put("green", "#0f0");
        colors.put("blue", "#00f");
        colors.put("white", "#fff");

        //
        // Get a random entry from the hashtable.
        //
        Object[] keys = colors.keySet().toArray();
        Object key = keys[new Random().nextInt(keys.length)];
        System.out.println(key + " = " + colors.get(key));
    }
}

• About
• Latest Posts

Wayan Saryada

A programmer, runner, recreational diver, currently living in the island of Bali, Indonesia. Mostly programming in Java, creating web based application with Spring Framework, JPA, etc. If you need help on Java programming you can hire me on Fiverr.

Latest posts by Wayan Saryada (see all)

• How do I generate random string? - May 16, 2016
• How to check if an object reference is not null? - March 18, 2016
• How do I create a custom TemporalAdjuster? - March 10, 2016