: Always override them together. If you break this, HashMap and HashSet will fail.
: Always specify types (e.g., List , not List ) to catch errors at compile time.
: Use checked exceptions for recoverable conditions and runtime exceptions for programming errors. 💡 Key Takeaway : Always override them together
: Throw exceptions early (at the start of the method).
: Use this when constructors have many parameters (especially optional ones). : Always override them together
: Always provide a useful implementation to make debugging easier.
: Favor immutable classes (like String ) to make code thread-safe and less buggy. : Always override them together
: Don't use them for normal control flow.