TheServerSide

Java array size, length and loop examples

Community driven content discussing all aspects of software development from DevOps to design patterns. Here are the most important concepts developers must know when they size Java arrays and deal ...
TheServerSide

How a Java HashMap internal implementation works

A frequently asked question in a Java interview is: How to implement a Java HashMap? Java job seekers must fully grok this important concept if they want to ace the interview. The HashMap tutorial ...
GitHub

ArrayList initialized by Gson with a TypeToken returns NullPointerException on android 11 & 12

2.9.0 and 2.8.7 A NullPointerException occured indicating the ArrayList was either null or not of the expected type on Android 11 and 12. Android 10 and below A HashMap is succesfully added to the ...
GitHub

Casting list of JSONObject to JSONObject throws ClassCastException

When calling the toList() method of a JSONArray which contains JSONObject the returned list contains HashMap elements. The documentation mentions: Returns a java.util.List containing all of the ...
Houston Chronicle

How to Assign Random Numbers to an Array in Java

Java has a "Random" class that lets you generate a random number you use to implement calculations in your Java source code. You use this library to generate a random number and insert the number into ...