Overview While preparing for the OCP 17 exam, I created some notes to aid my learning. This is the first of many posts in this series. I hope you find it helpful. Java Exception Handling Cheat Sheet The Throwable family Checked vs. unchecked exceptions Overriding methods with declared exceptions Example RuntimeException Checked exceptions Error Exception … Read more
Overview This tutorial shows you what equals and hashCode are and how to properly override them. If you have written in Java long enough, you will learn that using the equals method instead of == is the right way to assert equality. This is because the == operator compares the two objects’ memory addresses. The … Read more
In this post, I will introduce the fundamentals of serialization in Java that you need to know. The Serializable interface A class that doesn’t implement the Serializable interface cannot be serialized. In the previous post, you can see that the Car and Engine classes both implement Serializable. The Serializable interface is a marker interface. That … Read more
What is variable initialization in java? What do Java developers need to know about this topic? Find out here!
Overview A priority queue is an interesting data structure in Java. The key term here is “priority”. That means the queue is ordered by priority of the elements, not the order they are added. Let’s consider an example: When that function is run, the output is: As you can see, the order of elements in … Read more
Overview In this post, we are going to learn about Deque in Java (pronounced deck) and its implementation. It may surprise you to see LinkedList is a queue. LinkedList is a queue and also a list. That means it has all the characteristics of a List and also a Deque. What is a Deque in … Read more