5 best practices for writing bug-free Java code

The popularity of the Java programming language can be predicted from the scope of its use. From web application development to Android applications, this programming language is widely used to develop applications / codes with multiple functionality of all small and large business / niche like automatic watch winder technology, hospitality, l real estate or any other media company like the Jason Hartman Foundation.

When writing code, developers work hard to write bug-free code with the least complexity and the most functionality. Whether you are a newbie source code writer or an expert, there are certain rules you should always follow to get the best code for your client. Below are the rules for bug free code writing.

Rule 1: No need to depend on initialization

In Java, developers still depend on using constructors to initialize an object. But it’s a big myth that most developers follow. There are many ways to allocate an object without calling a constructor.

To do this, you can take one of the following steps:

  • You can declare all variables as private. To access the object outside of the class, you can then use the GET and SET method.
  • For each object, write a new private boolean variable and initialize it.
  • Write a non-constructor class that will ensure that every object is initialized before calling anywhere in the code.

Rule 2: Secure your classes, your method and your variables

In your code, you will make some classes, methods and variables private and others public. Private classes are not easily accessible, making them a secure point of code. But public methods, variables are easily accessible and become a point to attack. So, try to do them with a limited scope.

Always remember to make classes, methods, and variables public when you have the only option to do so.

Rule 3: always predefine the scope

Most developers are totally dependent on the scope of packages, but you should always predefine the scope of your code. There are many classes that are not closed on their own; leaving an escape route for attackers. A hacker can use a single flaw to insert their own class which can use sensitive information in your code. The JVM is not closed by default, which allows you to close your classes within the package.

Rule 4: Avoid Using Inner Classes

Usually, developers use inner classes whenever they are needed in other classes in the same package. Inner classes are generally accessible to all other classes in the same package, and it’s already mentioned that you need to predefine the scope of each class you create in code.

Rule 5: Guarantee non-cloning classes

Java has a feature to clone its own classes whenever needed. But this feature can also be misused by hackers. A hacker can easily use the java.lang.Clonable to create duplicate instances of the code and steal the necessary information from your code.

To get rid of this problem, all you need to do is add the following code to each class of your code.

public final void clone()throws
java.lang.CloneNotSupportedException {
    thrownewjava.lang.CloneNotSupportedException();
}

Yes you want your to classify be cloned, and you have thought about the consequences of this choice, then you can still protect yourself. If you define a cloning method yourself, do so final.

Yes you rely on a non-final cloning method in one of your superclasses, and then define this method:

public final void clone()
throwsjava.lang.CloneNotSupportedException {
    super.clone(); }

There is no one on the planet who can be considered a 100% expert on Java. But keeping in mind the concepts of Java programming and your own experience, you can easily code without encountering a bug.

Start coding!

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