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There is nothing special about static members here. The finalize method is called on an object when the object is being garbage collected. An object is being garbage collected when the object is no lo …

e.g. settings-prod-run-configuration-1.properties, settings-prod-run-configuration-2.properties, etc); start your application on production using a script that sends the appropriate parameters to the java …

Check out the {@link Model} interface for a Java-5-based interface variant that serves the same purpose. …

I want to add one thing. Although the existing answers mention this, they do not expand on it: what's difficult in concurrency is not just the interactions between threads (wait, notify, locks, etc), …

When doing I/O in Java, you will find you have to deal with a lot of exceptions, which is somehow normal given the many ways that could fail (Java has a lot of checked exceptions, but even in other languages …

Before thinking about possible patterns, you should think about how to apply this thinking into code: if date range is between 1932 - 2010 then points will be 20 ( 1932 ) + 10 ( this range is cove …

Java is a generic language and as such you will find implementations of the data structures that are suitable for, let's say, 99% or the use cases. … You need to box these to Integer or Long to use the Map in Java. Kevin Cline mentioned this in his answer. If you have a Map of a few million items stored in memory, every bit counts. …

There are various ways to connect to a relational database to store and retrieve information. Depending on your needs you can go with a low level implementation or a higher one. You could directly us …

This is an open ended questions with lots of possible responses that depend on what you are trying to do. Nevertheless I'll add a few things as an answer, since a comment won't be large enough. Th …

It's over engineering or just paranoia ;p ? I don't think it's either. Yes, a map is a generic data structure but it's also the first thing you reach out for when you need key-value or param-valu …

There isn't one correct answer for any of the questions you have asked. Architecture, concurrency, performance, programming languages, etc, it's all a matter of trade-offs. Experience is the thing tha …

As I understand your post, there are two questions here. One is how to build a mental model of a linked list. The other is how to deal with all of the checks for null. If you want a simple model to t …