Exception Handling Best Practices

title: Exception Handling Best Practices description: Java exception handling ke best practices

1. Specific Exception Catch karo

java exampleWoHoTech

// Bad
catch (Exception e) { }

// Good
catch (FileNotFoundException e) { }
catch (IOException e) { }

2. Empty catch block mat rakho

java exampleWoHoTech

// Bad
catch (Exception e) { } // Silent failure — bahut bura

// Good
catch (Exception e) {
    logger.error("Error occurred: ", e);
    throw new RuntimeException("Processing failed", e);
}

3. Exception Swallow mat karo

java exampleWoHoTech

// Bad
try { riskyOperation(); }
catch (Exception e) { return false; } // Exception lost!

// Good
try { riskyOperation(); }
catch (Exception e) {
    logger.error("riskyOperation failed", e);
    return false;
}

4. Resources close karo — try-with-resources

java exampleWoHoTech

// Good
try (InputStream is = new FileInputStream("file")) {
    // use is
} catch (IOException e) {
    e.printStackTrace();
}

5. Custom Exceptions meaningful banao

java exampleWoHoTech

// Bad
throw new Exception("Error");

// Good
throw new UserNotFoundException("User not found with id: " + userId);

6. Checked Exception sirf tab jab caller handle kar sake

Agar caller kuch nahi kar sakta — RuntimeException use karo.

7. finally mein exception mat throw karo

Original exception lost ho jaati hai.

8. Log karo, phir handle karo

java exampleWoHoTech

catch (SQLException e) {
    logger.error("DB error for user: " + userId, e);
    throw new ServiceException("Could not retrieve user", e);
}

title: Exception Handling Best Practices description: Java exception handling ke best practices

1. Specific Exception Catch karo

java exampleWoHoTech

// Bad
catch (Exception e) { }

// Good
catch (FileNotFoundException e) { }
catch (IOException e) { }

2. Empty catch block mat rakho

java exampleWoHoTech

// Bad
catch (Exception e) { } // Silent failure — bahut bura

// Good
catch (Exception e) {
    logger.error("Error occurred: ", e);
    throw new RuntimeException("Processing failed", e);
}

3. Exception Swallow mat karo

java exampleWoHoTech

// Bad
try { riskyOperation(); }
catch (Exception e) { return false; } // Exception lost!

// Good
try { riskyOperation(); }
catch (Exception e) {
    logger.error("riskyOperation failed", e);
    return false;
}

4. Resources close karo — try-with-resources

java exampleWoHoTech

// Good
try (InputStream is = new FileInputStream("file")) {
    // use is
} catch (IOException e) {
    e.printStackTrace();
}

5. Custom Exceptions meaningful banao

java exampleWoHoTech

// Bad
throw new Exception("Error");

// Good
throw new UserNotFoundException("User not found with id: " + userId);

6. Checked Exception sirf tab jab caller handle kar sake

Agar caller kuch nahi kar sakta — RuntimeException use karo.

7. finally mein exception mat throw karo

Original exception lost ho jaati hai.

8. Log karo, phir handle karo

java exampleWoHoTech

catch (SQLException e) {
    logger.error("DB error for user: " + userId, e);
    throw new ServiceException("Could not retrieve user", e);
}

Exception Handling Best Practices

1. Specific Exception Catch karo

2. Empty catch block mat rakho

3. Exception Swallow mat karo

4. Resources close karo — try-with-resources

5. Custom Exceptions meaningful banao

6. Checked Exception sirf tab jab caller handle kar sake

7. finally mein exception mat throw karo

8. Log karo, phir handle karo

Continue learning this concept

Exception Handling Best Practices

1. Specific Exception Catch karo

2. Empty catch block mat rakho

3. Exception Swallow mat karo

4. Resources close karo — try-with-resources

5. Custom Exceptions meaningful banao

6. Checked Exception sirf tab jab caller handle kar sake

7. finally mein exception mat throw karo

8. Log karo, phir handle karo

Continue learning this concept