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Collection continuation

HashMap

FileWriter

Serialization

Java is a high-level, object-oriented programming language developed by Sun Microsystems (now owned by Oracle) and released in 1995. Designed to be platform-independent, it follows the philosophy of "write once, run anywhere," meaning that Java code can run on any device with a Java Virtual Machine (JVM).
Key Features of Java:

Object-Oriented: Java is based on object-oriented principles, where everything revolves around objects and classes. This promotes modular, maintainable code.

Platform Independence: Java achieves platform independence through the JVM, which interprets compiled Java bytecode and executes it on any device with the JVM installed.

Simple and Easy to Learn: Java has a clear syntax, borrowing from C++ but eliminating complex features like pointers and operator overloading, making it easier for developers.

Robust and Secure: Java emphasizes strong memory management, type-checking, and exception handling to create reliable, secure applications. Its security features are particularly important in web and networked applications.

Multithreading: Java has built-in support for multithreaded programming, allowing developers to build applications that perform multiple tasks concurrently.

Automatic Memory Management (Garbage Collection): Java uses automatic garbage collection, meaning it handles memory allocation and deallocation, reducing the risk of memory leaks.

Rich Standard Library: Java comes with a vast standard library (Java API) that provides pre-built classes and methods for tasks like I/O operations, networking, data structures, GUI development, and more.