Finally Block in Java

beginner· Exceptions · Error Handling

Problem

A finally block runs after a try or catch block finishes, even if that block exits by returning a value instead of falling through normally.

Return a value from inside a try block, and show that the finally block still runs before the method actually returns.

Input

value = "42"

Output

Cleanup: process() is finishing
Parsed value: 42

Java Program

Java

public class FinallyBlockDemo {
    static String process(String value) {
        try {
            int num = Integer.parseInt(value);
            return "Parsed value: " + num;
        } catch (NumberFormatException e) {
            return "Invalid number: " + value;
        } finally {
            System.out.println("Cleanup: process() is finishing"); // runs before the return actually completes
        }
    }

    public static void main(String[] args) {
        System.out.println(process("42"));
    }
}

▶ Run Code

Output

Cleanup: process() is finishing
Parsed value: 42

Core Logic

Returning from inside a try block doesn't skip its finally block — the return value is computed and held, the finally block runs, and only then does the method actually hand that value back.

How It Works

1process("42") parses the string successfully and reaches return "Parsed value: " + num; inside the try block.
2Java doesn't return immediately at that point — it first runs the finally block, which prints the cleanup message.
3Only after finally finishes does the method actually return the value that was computed earlier.
4main then prints whatever process() returned, which is why the cleanup message appears before the parsed result.

For value = "42", the cleanup message prints first from inside finally, then main prints the returned string, "Parsed value: 42".

💡

Key Point: A return statement inside try doesn't exit the method immediately — finally always gets a chance to run first, which is exactly why it's a safe place for cleanup code regardless of how the try block exits.

Key Concepts

finally blockreturn inside tryexecution order

← Previous

FileNotFoundException

Handling Division by Zero

Related Programs

Exceptionsbeginner

ArrayIndexOutOfBoundsException

Exceptionsintermediate

Custom Exception