Throws Vs Try-Catch With Examples in Java-Selenium

📌Throws & TryCatch

While conducting interviews, I've observed that individuals are familiar with the definitions of "throws" and "try-catch" but often lack a comprehensive understanding of their usage.Let's try to understand with examples...In Java, try-catch blocks are used for exception handling, while throws is used in method declarations to indicate that a method might throw a specific type of exception. In the context of Selenium, here's a brief explanation:

*****🔴 Try-Catch:*****

👉 Usage:

It is used to catch and handle exceptions within a specific block of code.

👉 Example:

try {WebElement element = driver.findElement(By.id("example"));element.click();} catch (NoSuchElementException e) {System.out.println("Element not found: " + e.getMessage());}

👉 When to Use:Use try-catch when you want to handle exceptions immediately within a particular code block.

👉 Pros:Provides a localized way to handle exceptions, making the code more robust.

👉 Cons:Can lead to code duplication if similar exception handling is required in multiple places.

******🔴 Throws:******

👉 Usage:

The biggest problem is handling the exceptions needs to be done in the calling methods too.. It is used in method declarations to indicate that the method may throw a specific type of exception, and the responsibility to handle the exception is delegated to the calling method.

👉 Example:

public void clickElement() throws NoSuchElementException {WebElement element = driver.findElement(By.id("example"));element.click();}

👉 When to Use:

Use throws when you want to delegate the responsibility of handling exceptions to the calling method.

👉 Pros:

Promotes cleaner code by separating the concern of exception handling from the method's logic.

👉 Cons:

Requires the calling method to handle the exception or declare it with throws.

🔴 Choosing Between Try-Catch and Throws:

👉 Use try-catch when you want to handle exceptions immediately within the current block of code.

👉 Use throws when you want to delegate the responsibility of handling exceptions to the calling method.

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