finally keyword in java  

finally keyword in java  

The finally keyword in Java is used to specify a statement that will be executed after the execution of either an If statement or an Iteration statement, or both.

So, if you have code that must be executed regardless of whether the statements before it succeed or fail, you can use the finally keyword to execute those statements.

finally keyword in java  

This article explains how and when to use the finally keyword in Java programming, with examples. Read on…

What is the finally keyword in Java? – finally keyword in java  

The finally keyword in Java is used to specify a block of code that will be executed after a method has been executed, regardless of whether the method succeeded or failed.

For example, if you make a network request using Java, the network request will be executed and the control will be transferred to the next statement after the network request.

But what if the network request fails? You will not be able to execute the statements after the network request. This is where finally comes into the picture.

The finally block will still be executed, and you can take appropriate action based on whether the network request succeeded or failed.

How to use finally in Java?

As explained above, the finally keyword in Java is used to specify a block of code that will be executed after a method has been executed, regardless of whether the method succeeded or failed.

Let’s look at an example of using the finally keyword in Java in a program. Here is the program to illustrate how to use finally in Java.

This program makes a network request to get a list of users from a remote server. If the network request succeeds, it will display the result in the console.

If the network request fails, it will display an appropriate message. Here the code after the network request will only go to the next line if the network request succeeds.

So if the network request fails, the code after that will not be executed. Here the finally keyword comes in handy. The finally block will be executed no matter what happens with the network request.

When to use finally in Java?

As explained above, the finally keyword in Java is used to specify a block of code that will be executed after a method has been executed, regardless of whether the method succeeded or failed.

So, if you have code that must be executed regardless of whether the statements before it succeed or fail, you can use the finally keyword to execute those statements.

The finally block is a good place to dispose of any resources that are being used in the method. You can use try-catch-finally to take care of errors, but you can also use finally to close resources, such as files, network connections, etc.

Avoid using finally

While using the finally keyword, make sure you do not put any code inside the finally block that will result in an infinite loop.

An infinite loop is a program that will never end and keep executing the same code over and over again. Let’s look at an example to understand this better.

In the example below, the loop will keep executing the code in the finally block. Here the finally block contains a loop that will keep executing until the value of i is 0.

The value of i will never be 0 because the code in the finally block will keep executing. This is an infinite loop and this code will keep executing until the computer’s operating system shuts it down.

Conclusion

The finally keyword in Java is used to specify a block of code that will be executed after a method has been executed, regardless of whether the method succeeded or failed.

The finally block is a good place to dispose of any resources that are being used in the method. When using the finally keyword, make sure you do not put any code inside the finally block that will result in an infinite loop.

An infinite loop is a program that will never end and keep executing the same code over and over again. This will result in a program that keeps running forever and is not stopping.

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