Java Library- Notes by Shariq SP

Introduction to Object Class

The Object class is the root class in Java's class hierarchy. Every class in Java is directly or indirectly derived from the Object class. It provides basic functionalities that are common to all Java objects, such as toString(), equals(), and hashCode() methods.

Introduction to String Class

The String class in Java represents a sequence of characters. It is immutable, meaning once a String object is created, its value cannot be changed. String class provides various methods for string manipulation and comparison.

Introduction to StringBuffer and StringBuilder

StringBuffer and StringBuilder classes in Java are used to create mutable strings. StringBuffer is synchronized and therefore thread-safe, while StringBuilder is not synchronized and provides better performance in single-threaded environments.

Introduction to Wrapper Classes

Wrapper classes in Java provide a way to convert primitive data types into objects. They are used when an object is required, such as in collections or when dealing with methods that require objects.

Introduction to Exception Handling

Exception handling in Java is a mechanism to deal with runtime errors and exceptional conditions that may occur during the execution of a program. It involves the use of try, catch, and finally blocks to handle exceptions gracefully.

Introduction to Thread and Multithreading

Threads in Java allow concurrent execution of tasks, enabling applications to perform multiple tasks simultaneously. Multithreading is the process of executing multiple threads concurrently within a single process.

Introduction to Collections Framework

The Collections Framework in Java provides a set of classes and interfaces for handling and manipulating collections of objects. It includes data structures such as lists, sets, maps, and queues, along with algorithms for their manipulation and traversal.