What is the best way to handle exceptions in Java?

What is the best way to handle exceptions in Java?

9 Best Practices to Handle Exceptions in Java

1. Clean Up Resources in a Finally Block or Use a Try-With-Resource Statement.
2. Prefer Specific Exceptions.
3. Document the Exceptions You Specify.
4. Throw Exceptions With Descriptive Messages.
5. Catch the Most Specific Exception First.
6. Don’t Catch Throwable.
7. Don’t Ignore Exceptions.

How many ways can you handle exceptions in Java?

Customized Exception Handling : Java exception handling is managed via five keywords: try, catch, throw, throws, and finally. Briefly, here is how they work. Program statements that you think can raise exceptions are contained within a try block. If an exception occurs within the try block, it is thrown.

What are the two ways to handle exceptions in Java?

Java provides two different options to handle an exception. You can either use the try-catch-finally approach to handle all kinds of exceptions. Or you can use the try-with-resource approach which allows an easier cleanup process for resources.

What are the common exceptions in Java?

Now let’s look at some of the most common Unchecked exceptions in Java….Unchecked Exceptions

1. NullPointerException.
2. ArrayIndexOutOfBoundsException.
3. IllegalStateException.
4. ClassCastException.
5. ArithmeticException.
6. IllegalArgumentException.

What should you avoid when handling exceptions in Java?

Here are a few things you should avoid when handling exceptions in your application. As I explained in one of my previous posts, you either need to specify or handle a checked exception. But checked exceptions are not the only ones you can specify.

Why are exceptions considered an anti-pattern in Java?

Using exceptions to control the flow of your application is considered an anti-pattern for two main reasons: They basically work like a Go To statement because they cancel the execution of a code block and jump to the first catch block that handles the exception. That makes the code very hard to read.

Why are checked exceptions called checked exceptions in Java?

They are called checked exceptions because the compiler verifies them during the compile-time and refuses to compile the code if such exceptions are not handled or declared. Such exceptions are usually used to notify the user that a method can result in a state that needs to be handled.

What are some common mistakes to avoid in Java?

As you’ve seen, there are several common mistakes you should try to avoid when you handle Java exceptions. That helps you to avoid common bugs and to implement applications that are easy to maintain and to monitor in production. If this quick list of common mistakes was useful, you should also take a look at my best practices post.