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<String, String> 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.
String[] keys = colors.keySet().toArray(new String[colors.size()]);
String key = keys[new Random().nextInt(keys.length)];
System.out.println(key + " = " + colors.get(key));
}
}
Latest posts by Wayan (see all)
- How do I iterate through date range in Java? - October 5, 2023
- How do I create a string of repeated characters? - September 1, 2023
- How do I convert datetime string with optional part to a date object? - August 28, 2023