Java has many features, but the key one is the principle of translating code into a special bytecode that is not tied to a platform. Subsequently, this bytecode is processed by the JVM. This factor distinguishes Java from other interpreted languages such as Perl, PHP, etc. They have code that goes straight to the interpreter. On the other hand, Java is also not a purely compiled language (similar to C-like languages).
The unusual architecture makes applications based on Java cross-platform and portable. Such products can run on Windows, Linux, Mac OS and do not even require recompilation of code. The implementation of JVM on all platforms may be different, but the principle and course of execution remains the same.
Java syntax is close to C, very similar to C# and C++. If you know any of the C-like languages, it won’t take you long to get to grips with Java.
The next important feature of the language is that it automatically collects all the garbage and removes it from memory. In practice this means that Java removes unused and obsolete objects from memory without additional commands. In other languages you have to do this manually, periodically writing the appropriate commands.
Java is classified as an object-oriented language. It supports inheritance, polymorphism and other things. This approach helps create large projects that are easy to scale, extend and edit.
It’s a relatively simple language that can be learned fairly quickly. Thanks to frameworks on it you can create standard functionality for websites, games and applications for PCs and smartphones in a couple of commands without messing with the low-level code.
Although Java is a universal language, but you need to pick up the industry in which you want to continue to work. The thing is that the language has a lot of libraries, to learn all just unrealistic. It is better to determine the target area and study the appropriate libraries.