4 Common Mistakes Java Developers Make That You Should Know

a programmer coding

a programmer coding

Java is a popular programming language used by millions of programmers around the world. Its flexibility and ease of use make it a language of choice for most. So, if you’re thinking about becoming a great Java developer, you need to know what common mistakes to avoid.

Memory Leaks

Java is great at handling memory, but even then, every Java developer should always be aware of how this memory management works. There can still be memory leaks that one should be aware of. For example, if you reference everlasting objects, the garbage collector will not be able to remove objects from the heap, causing a memory leak. If something like this keeps happening, you’ll be using more resources and end up with a hard to detect “OutOfMemoryError”

Neglecting Existing Libraries

Developers often make this naïve mistake. Ignoring a bundle of preexisting libraries is simply a blunder. Before you start creating a new library, explore the ones that exist. Many of them have been there for years, are completely maintained, and are free to use. This way, you don’t have to create extra code when you already have code out there waiting for you to use it.

a person coding on his laptop

a person coding on his laptop

Accessing Non-Static Members From Static Methods

In Java, a static method is a member of a class, not of objects and instances. Therefore, you can call a static method without creating a new instance of it. The non-static method, on the other hand, can simply call the static one without using the instance of the class.

Excessive Garbage Allocation

Java automatically takes care of memory allocation for you. This means every time you create a new variable, you don’t have to mention its length. Garbage Collection in Java keeps in check the memory that’s no longer in use and recycles or frees to be used by other jobs waiting in the queue. You don’t have to manually free the memory; it’ll be taken care of in the JVM.

The concept is that every object created in Java is there for a short time, and its memory can be reclaimed after its work is done. If you keep creating short-lived objects, you’ll be creating excessive garbage collection, which will impact your application’s performance.


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