Custom Exceptions

Creating your own exception classes

5 min read

Custom Exceptions

Custom exceptions represent application-specific error conditions.

Code Examples

Creating a custom checked exception

java
1
2class InvalidBalanceException extends Exception {
3    public InvalidBalanceException(String msg) {
4        super(msg);
5    }
6}
7

Use Cases

  • Domain-specific errors
  • Readable error handling

Common Mistakes to Avoid

  • Not extending Exception/RuntimeException
  • Poor naming