Java Programming Language Overview Tutorial
Java is one of the most famous and most used high level programming languages in the software development industry. It is a platform independent, high level, object oriented programming language.
Why this Java series is structured this way
Java is best learned in layers. We start with core language concepts, then move into object‑oriented principles, and finally cover collections and advanced topics. This structure mirrors how Java is used in real projects and helps you avoid gaps that cause confusion later.
If you are preparing for interviews, the early topics give you common question coverage. If you are building applications, the collections and concurrency topics will become your daily tools. Use the sidebar to progress in order, and revisit the overview when you need a reset.
In this Java tutorial series, we are mainly focusing on problems that may be asked by the interviewers in the interviews (Java interview questions).
Why Java?
Java is a platform independent programming language
Users can run Java applications on multiple environments like Linux, Windows, Mac, etc. The only requirement is JRE should be installed in the environment and need to compile the code for the environment. No need to change the code for each environment.
Java achieves this platform independent ability with the Java Runtime Environment (JRE).
Java is a secure programming language
Due to the below reasons, Java reduces its security issues flows.
- Java doesn't have pointers this prevents unauthorized access to memory blocks
- No access to memory management
- Byte code verification
- No buffer overflow exploits
- Cannot access out of bound arrays
- Its run on a virtual machine
- Access controls
- Exception handling
Java is an Object Oriented Programming Language
Java follows below object oriented principals.
- Inheritance
- Polymorphism
- Abstraction
- Encapsulation
Java has a huge community and well explained documentations
Since java has a huge community, you can solve all your technical problems by getting the community expert's help. Also, you can refer to the java documentation for updating your knowledge about java.
Java has a huge collections of widely used and well tested open source libraries
With the use of widely used open source libraries, you can achieve your goals very fast. You don't need to reinvent the wheel because whatever the requirement, you may find an open source java library for you. You can trust them because they are being tested by a huge user community every day.
Multi threaded applications
Java supports applications with multiple threads. With multiple threads, you can do multiple things parallelly. Especially if you want to process multiple things parallelly, you can generate multiple threads, and each thread will process separately from other threads.
Memory efficient (Garbage collector)
Java has a garbage collector, and it automatically identifies when to clean unwanted memory allocations. So the developer should not need to worry about releasing memory while doing development. This helps to avoid human errors and optimize memory cleanups.