Only for Java Programmers: Top Common Mistakes to Avoid

If you have ever checked out tutorials on the internet, you will probably come across numerous examples of common design mistakes made by Java programmers. Unfortunately, these mistakes can be hard to ignore because the code is sometimes quite simple, making it easy for the programmer to miss a few minor details that could cause a big problem later.

Java is one of the most popular programming languages. It has a lot of features that make it easier to develop complex programs, and many people are attracted to it as they can create their own GUI applications. The language has been evolving since its inception and there have been a few changes to it, with more coming.

The language has many pitfalls that can make it difficult for someone new to the language. The syntax is quite complex, and many rules must be followed while writing code in Java. Over the years, there have been numerous publications written about Java and its features. However, one thing is for sure: it's still an open book for you when it comes to making mistakes as a Java developer. So here in this blog, we will see what common mistakes are to be avoided by Java programmers.

Using a loop in the wrong place

Loops should be used only for iterating over collections, or when you know exactly how many elements you need to iterate over. If you don't know how many items are in a collection, or if it doesn't make sense to use a loop, then it's better to just create an array and iterate over that instead of using a loop.

Using an incorrect type

It's easy to forget that your program requires different numeric types than those in your class definitions. For example, a double value is stored as 64 bits, whereas an int value is stored as 32 bits - so if you're casting between these types without understanding what they mean, then you could inadvertently change one variable into another type, which will cause unexpected results.

Using the wrong variable name

Sometimes it's not the type of variable that causes problems, but rather the name of it. For example, if you create a variable called "my array" and then try to access an element by using my array[4] instead of its actual index number, then this will cause an error because it won't be able to find the 4th element when it's looking for the 3rd one.

Using the wrong data type

This is a similar problem as above. If you create an array and store values in it, but then try to access them using a different data type, then this will cause unexpected results because it won't know how to handle that information.

Not knowing when to use "for" or "while"

You might be asking yourself, "Can't I just use loops for everything?" Well, yes and no. In some cases, using a for loop will work just fine. But other times, you'll need to use while loops instead.

How You Can be Better at Using the Java Programming Language

The main reason Java programmers fail is a lack of proper knowledge or lack of practice. So, it is very important to know the common mistakes that you can make while writing Java code so that you can avoid them while developing your applications.

Here are some tips to be a good Java programmer:

• Use Java 7 or 8: While developing an application, you will find that there are lots of new features introduced in Java 7 and 8 that help you write better code, faster and with less effort. So, if you want to write quality code, then use these versions instead of older versions like Java 6 or 5.
• Use NIO: Java has a feature called NIO which allows developers to write asynchronous code easily by using channels and threads like any other programming language, but this doesn't mean that you should always be using this feature. It isn't easy, and even if you are a very experienced programmer, it will take you a while to get used to it. The best thing is that you can use NIO when needed, and otherwise stick with the old way of writing code, which is called blocking IO.
• Read a lot of code: If you are a beginner, then reading code will help you learn how to write better code yourself. You can find many open-source projects that have been written by programmers who are much more experienced than you, so try reading some of their code and see if there is anything that stands out to you.
• Write more code: This is the most important thing that you can do. The only way to become a better programmer is by writing code, so try to write as much code as possible. Even if it's just a few lines of code at first, try building a small program that does something useful, such as adding two numbers or displaying some text on the screen. Try to write more code every single day, even if it's only a few lines.
• Find a mentor: A good mentor is someone who has been programming for many years and has seen all of the mistakes that you will make along the way. They can help you avoid common pitfalls by sharing their experience with you so that you don't have to make them yourself. Find a mentor who has been programming for a long time and is willing to spend some time with you.
• Practice: Programming is similar to any other skill in that the more you practice, the better you will become. The important thing is to find a way of practicing that suits you. You might want to try different things like learning new programming languages or solving problems on sites like CodeWars and Hackerrank. These sites give you access to thousands of programming challenges that will test your abilities as a programmer in many different ways.
• Find a problem that needs solving: It can be hard to come up with your own problems at first, so try solving some of those in this book or look for projects on GitHub that interest you. If you don't find any problems that interest you, try making some changes to the existing code and see if it works as expected. You can also think about what you would want from a program if it was written for your own needs.

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