10 Tips – Learn Software Development in Java

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10 Tips – Learn Software Development in Java     

Learning Java is a great step to take since it is one of the best and most popular programming languages. Billions of devices run Java programs while millions of developers create new Java programs each year. Therefore, if you wish to learn how to code in Java, here are a few tips that will benefit you throughout your endeavors using Java.

Focus on the basics

Java is a wide programming platform and contains numerous options and features. Due to its vastness, many beginners in Java want to learn everything in the shortest time possible.

Do not let the excitement derail you. Mastering the basics in Java will give you a steady foundation that will make learning all the other components quick and easy. However, if you fail to grasp the basic workings of Java properly, the programming in the advanced levels will always prove to be frustrating.

Practice

This point is hinged on your main reason for learning Java. If your wish to stuff your brain with all the Java jargon and common code so that you can ace a test, then solely reading might do the trick. However, for a person who wishes to program using Java, gaining the theory is not enough. Practicing your theory, no matter how useless the programs you develop might be, sharpens your skill and enables you to learn even more through the errors you might make. It also gives you skills in debugging, since you have to trace your errors and fix them.

Understand the code

Simply writing code and having it perform a task will not help you much if you do not understand its inner workings. Try and figure out why the program behaves the way it does. Learn the cycle steps of a “for loop” and a “nested for loop” will be easy to understand.

Knowing how the code works enables you to manipulate it and use it in different settings.

Remember to allocate memory

If you are new to Java but not to programming languages, and you have knowledge in C or C++, then take note of this point. Since Java is a dynamic language (class files are loaded at runtime), you have to allocate memory when declaring objects and arrays. Memory is allotted using the keyword ‘new,’ and failure to assign memory results in a null pointer exception error. This feature is not present in static programming languages such as C.

Create efficient code

Since new objects need to be allocated memory when created, you should be careful when creating code to ensure you don’t hog the device’s resources. Useless objects might not affect your code, but they will affect how the program runs and how much memory it requires.

Interface over Abstract

Since Java does not have multiple inheritance, you will have to find a new way to perform multiple inheritance functions. Implementing an interface or an abstract class will help you achieve multiple inheritance-like functions. However, interface classes offer more liberty than abstract classes. Furthermore, the interface classes implement abstract methods and therefore, they can be used in place of abstract classes.

Avoid memory leaks

Java assumes automatic memory management, and hence programmers have very little control over the program’s memory consumption. However, there are some programming practices that you can adopt to ensure that your code does not hog additional memory.

Ensure that you release database connections after the function has completed querying.

Using the “finally” block also helps to limit memory usage.

Instances in static tables should be released.

Standard library

The standard library is shipped with Java, and it makes the job of a programmer a lot easier. The library contains a wide collection of classes that a program developer can call instead of creating new ones. Furthermore, since the library is standard, it ensures that your program is portable and it can run on other machines that have the Java JDK. The Java library classes also consist of the most trusted reusable code since they are rigorously tested and constructed in an efficient manner making them the best option when you get the chance to use them.

Use primitive instead of wrapper classes whenever possible

Although wrapper classes offer great utility when writing code, they are not as efficient as primitive classes. The primitive classes store information about the values they hold while the wrapper classes store data on the entire class, which makes them consume more memory than the primitive classes. Moreover, since wrappers deal with objects rather than values, comparing wrapper classes tends to produce undesired results.

Strings

By now you might have realized that managing memory is essential when you are trying to create efficient programs in Java. When working with strings, always try to refrain from instantiating a string using a constructor. This is because the strings are considered as classes and actions such as concatenation result in the formation of a new string object which consumes more memory.

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