Republished articles with source attribution. This collection is separate from Diary Coding’s original guides and does not display ads.
Creating an application for users in different regions can be hard in terms of the message format for the local region. Java provide a ResourceBundle class that help internationalize our application. To create resources for i18n (there are 18 letters between the first i and the final n) we need to create a file for […]
In the code example below we demonstrate the ArrayUtils.toPrimitive() method to convert an array of Integer object to an array of its primitive type. Besides converting an array of Integer objects, this method is overloaded to accept other types of object’s array. package org.kodejava.commons.lang; import org.apache.commons.lang3.ArrayUtils; public class ArrayObjectToPrimitiveDemo { public static void main(String[] args) […]
This example uses the Apache Commons Lang’s ArrayUtils.toMap() method to convert a two-dimensional array into a Map object. To convert a two-dimensional array into a Map object, each element of the two-dimensional array must be an array with at least two elements where the first element will be the key and the second element will […]
In this example we are going to use the ArraysUtils helper class from the Apache Commons Lang library to reverse the order of array elements. The method to reverse the order of array elements is ArrayUtils.reverse() method. The ArrayUtils.reverse() method is overloaded, so we can reverse another type of array such as java.lang.Object, long, int, […]
In this example you’ll see how to create a client-server socket communication. The example below consist of two main classes, the ServerSocketExample and the ClientSocketExample. The server application listen to port 7777 at the localhost. When we send a message from the client application the server receive the message and send a reply to the […]
This example demonstrates how to use the java.io.ObjectOutputStream and java.io.ObjectInputStream classes to write and read a serialized object. We will create a Book that implements java.io.Serializable interface. The Book class has a constructor that accept all the book detail information. To write an object to a stream we call the writeObject() method of the ObjectOutputStream […]
Stay curious. There is always something new to learn.
Writer and founder of Diary Coding — sharing notes, tutorials, and experiences about programming for anyone who wants to keep learning.