Java is a language that can be difficult to master, but it’s also one of the most flexible and powerful languages in existence. It combines high-level features with low-level access to memory and hardware resources, allowing you to develop more complex programs than are possible with other languages like C++.
Use Java Naming Conventions
Java naming conventions are an essential part of writing efficient Java Software Users. There are a few rules you should follow when naming your classes and methods, including:
- Avoid using names like foo, bar and baz because they are too generic. Instead, use names that have meaning to the application being written (e.g., “myUser”).
- Use camelCase for class names and snake case for method names—this makes it easier to read source code later on down the line when you come back to it years later when there’s no one else around who can make sense out of what was originally written in such an inconsistent manner!
Favour Composition over Inheritance
- Composition over an inheritance. When you need to extend the behaviour of an object or share state between objects, it’s often better to compose them than inherit them from a base class. For example:
“`Java
Public class Test {
Public void test () {
System. Out. ("I am a test");
} }“`
Avoid Creating Unnecessary Objects
- Use the right data structure. In the case of Java, this means using an object-oriented language with polymorphism, which allows you to create one class that can act as many different types of objects.
- Use the right algorithm. The most efficient way to write code is by using algorithms that have been proven time and time again to be efficient—and there are plenty of good ones available in Java!
- Use the right language feature or library (or both). For example: if you need something like a private field or method for your class to function properly, consider adding those members yourself rather than reusing code from other classes or packages; doing so will save on unnecessary instantiation costs later down the line when they’re needed most often during testing phases after the release date has passed off into history’s memory banks always.
Eliminate Obsolete Object References
Eliminate Obsolete Object References
When you use a weak reference, the object is still in existence but no longer referenced by the current object. When you use a soft reference, it’s still there but doesn’t affect anything else. In both cases, when the original owner can no longer access your object through its reference (or vice versa), then what’s left of it is garbage collected automatically by Java’s garbage collector. It can be useful if you want to keep an object around for a while without worrying about whether the memory will be needed again later on—but remember: there will always come a time when this memory will also become a waste!
The only difference between soft and weak references is that you can use the latter to decide when an object should be garbage collected. When you use a weak reference, it’s still there but doesn’t affect anything else. In both cases, when the original owner can no longer access your object through its reference (or vice versa), then what’s left of it is garbage collected automatically by Java’s garbage collector.
Avoid Finalizers and Cleaners
- Avoid finalizers and cleaners.
- Use the Garbage Collector (GC) instead of the Finalizer to free up memory.
- Use try-with-resources for code that might block for a long time or has many resources being managed.
Know and Use the Libraries
You can save yourself a lot of time by knowing which libraries to use and when. Remember that a library is another way to write code; you should always choose the most efficient one possible.
For example:
- If you need numbers that are prime numbers, then you should use MathUtil’s primes() function instead of trying to do it yourself. This function will return all prime numbers in a given range or list of values (i.e., 2 <= x < 100). It also allows for customizations if needed – such as an option for checking whether x is prime or not before returning results into another variable named result_range_values_to_return
This function is also very efficient, as it doesn’t require you to write any of the code needed to do this yourself – saving you time and effort when writing your script.
Prefer for-each Loops to Traditional for Loops
The for-each loop is a concise way to iterate over the elements of an array or list. It’s also more readable and efficient than traditional loops, which can process each element individually.
The syntax for this construct looks like this:
for (int i = 0; i < size; ++i) { // code here }
Know and Use the Correct Exception Handling Features
Source:
https://www.averickmedia.com/technology-list/java-software-users-email-list
You can use the Java exception handling features to write code that will handle exceptions gracefully.
The first feature is a try block, which allows you to catch all exceptions in your program by enclosing a code block with a token indicating what type of exception you expect. For example, if an exception occurs while executing this code:
try { doSomething(); } catch (Exception e) { handle(e); } finally { cleanUp(); }
then it will run through each part of the try statement before exiting with an error message that says something like “the operation failed because:”. The next step is then catching this specific type of error using one or more catches, for example:
try{doSomething();} catch(IOException(e){handle(e); finally { cleanupCodeUsingWhile(this.getMessage()); }}
IoException is an exception that has to do with file I/O. It is thrown by the Java standard InputStream and Reader classes when attempting to read or write a file that has been closed or an error occurs while writing to the file.
Return Options Appropriately, or Better Yet, Avoid Them Entirely
It’s important to consider the behaviour of your code when you return an optional. What happens if a method returns null and gets called without any data passed in?
If you have a method that does something like this:
public void doSomething() { if(true) { // Do something } else { // Do something else } }
then any time someone calls that method with no value passed in, they will get an exception thrown by Java. This can be fixed by converting the optional into a normal object and then treating it as such afterwards: public void doSomething() { Optional string = Optional. of(“foo”); if(string != null) { System. out << “You got foo!”; } else System; }
There are other ways to handle this situation, too – putting an explicit return statement inside your function body and using another language feature like safe call operators (?).
Minimize Mutability
Minimizing mutability is one of the most important aspects of writing efficient Java code. You should use immutable objects whenever possible and avoid modifying them if you can help it. The Immutable interface provides a way to create immutable objects, while @Immutable annotation allows you to mark your classes as immutable by default.
Making your code easy to understand and avoiding memory leaks are important.
It’s important to keep in mind that memory leaks are bad. They can cause crashes and are hard to track down if you have a lot of code that uses the same variable or function repeatedly.
To avoid these issues, make sure your code is easy to read and understand by using good naming conventions and structuring it logically so that each class has its responsibility (e.g., one class handles UI elements while another handles communication with other systems). You can also use tools like Joda Time for Java 8, which will help you avoid common errors such as typos or forgetting about an interface implementation somewhere down the line during development time!
There are many ways to prevent memory leaks in Java 8, but the most important thing is to avoid relying on the global state. If you have a lot of functions that use the same variable repeatedly, make sure they operate on an instance of that class instead!
Conclusion
It’s easy to see why Java is such a popular choice for developers: it’s a solid, reliable language that offers developers a wide range of tools to work with. As discussed in this article, it’s not always as simple as just picking up your new copy of Java and getting started! When you write code, many things can go wrong, and you don’t know how they work or why they matter. By following these tips, however, you can avoid making common mistakes while still producing high-quality software in no time.
Author bio
Eric Spin is marketing, healthcare, and technology blogger and an employee of AverickMedia. He has been writing about the intersection of these industries for several years. With a background in marketing and a passion for healthcare and technology, Eric provides valuable insights and analysis on the latest trends and innovations in these fields while working at AverickMedia.
