Summary

1. Lack of Knowledge in Open Source Libraries

Half knowledge can always be dangerous for anyone and that’s what developers at the rookie stage do. Having less knowledge of any library that they’re looking to integrate can lead to blunders. While working on Java, you will find a vast variety of libraries that can be incorporated within the line of codes. Over the years, since its first version was published, its dedicated team ensures to push and refresh all the clean and updated libraries and resources to their end developers for smooth work. Library for Unit testing such as Junit, or PrimeFaces for developing rich web applications. There are tons of other libraries with which you must be familiar to achieve excellence in Java Programming....

2. Understanding Code’s “Logic” is All You Need

It’s practically not possible and feasible to remember every line of code of any programming language. Let’s suppose you’ve memorized some syntaxes, and other elements of Java, but when it comes to implementing them on real-life projects, it will become much more problematic for you. Perhaps, when you’ll become fluent in programming, there can be stances that you might not need to take any reference (most likely because of over practice) but that’s a different scenario, so the more implementation you’ll start doing, the more complexity you’ll be able to handle on any real-life project....

3. Always Have an “Action Plan”

When you start working on any project, it is a must to have an action plan in order to execute your project. Even your stakeholders might ask you about the pattern of approaching the execution, be it design, task allocation, or finishing dedicated tasks on priority, all it requires is to have a clear course of action plan to be a successful java developer. Being a rookie, it is not much expected from you to work as planned but as we discussed above, everybody learns from their mistakes. As you’ll be moving upward in your expertise, you might start working on more complex designs and applications that can be challenging for you. That’s why it is recommended to set a pathway of your approachability towards tasks that can satisfy both (management and stakeholders)....

4. ArrayList vs LinkedList

Since ArrayLists are more widely used and understood, doing so is simple. In many situations, LinkedLists outperform ArrayLists though, and vice versa. Considering the requirement, both perform remarkably well. In general, when an application requires storing and accessing data, ArrayLists are a better fit. When an application needs to manipulate the data that has been stored, LinkedLists are preferable....

5. Say No to “Memory Leakage”

As you’ll start working with Java programming language, you will learn that it offers a unique feature for managing memory automatically and that’s where the downfall of this feature relies. When we say automatic memory management, that doesn’t mean that you will avoid checking memory manually. That’s why, In order to survive any unavoidable memory leakage, developers should have the presence of mind to check on their project where they are writing the code to ensure that they are not leaving any stone unturned that leads to hampering performance degradation....

6. Difference between =, ==, and .equals()

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7. Handling Null Values/Exceptions

It is simple to confuse these three operators, especially the last two. Keep in mind that = is used as an assignment symbol. A referential equality comparison, or ==, determines if two objects point to the same location in memory. The equals() function determines whether the values of two objects are equal. Always compare objects, especially strings, using .equals()....

8. Missing “Braces”

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9. Never Leave “Exceptions” Behind

The NullPointerException is a problem that the majority of Java developers have encountered. When a variable is declared but no object is assigned to it before attempting to use the contents of the variable, the NullPointerException is thrown. Making a catchphrase for NullPointerException rather than providing code to manage the underlying null pointer dereferences is a common error. When programs handle null pointer dereferences rather than catching or suppressing NullPointerExceptions, it can be very challenging to pinpoint which expression is responsible for the exception in the try block or is adding unnecessary performance impact. Although there are other approaches to dealing with null values, there are two that work well when dealing with a String argument....

10. Lack of Practice

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Summary

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