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Core Java — Complete Notes by Durga Sir

• try: Block of code to monitor.
• catch: Block to handle the exception.
• finally: Block that always executes (used for cleanup code).
• throw: Used to explicitly throw an exception.
• throws: Declares that a method might throw an exception.

• String class: The String class is used to represent strings in Java
• String operations: Strings can be manipulated using methods like concat(), length(), and substring()

Inheritance:

Member-level modifiers (private, protected, static, transient, volatile). 4. Object-Oriented Programming (OOPS) "Is-A" relationship and code reusability.

• Checked vs unchecked exceptions; Error vs Exception; when to use custom exceptions.
• try-catch-finally, try-with-resources (AutoCloseable) with examples for file/db resources.
• Best practices: handle specific exceptions, avoid swallowing exceptions, exception translation, meaningful messages.
• Assertions: assert expression : message; when and how to enable (-ea).

Core Java complete notes by Durga Sir

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