![]() ![]() ![]() According to the BankM圜ell statistics, in 2021, the number of smartphone users in the world reached 6,378 billion. There’s a huge demand for Android developers, and it’s not likely to decrease soon. This job is for you if you like working on mobile apps. Java 8 (in particular, lambdas – special functions which don’t belong to a specific class)Īfter you get the first job, it will become clearer what to study next and which parts of the language you must pay the most attention to.Ģ.In addition to Core Java, you’ll need to study: But I created the general list of topics you’d better uncover before applying for a job (even as a Java trainee). The knowledge you need here may be very different depending on the company and projects you will be working on. The learning process should be based on your decision.ġ. There are three main directions: Java developer, Android developer, and Java developer for QA Automation. Choosing your directionįurther Java learning requires a more precise understanding of the type of job you’re aiming for. After that, you can go to the next level. So, in general, the starting point is to learn basic principles, terms, and concepts – and understand how to use them when coding. So, in an early stage of the Java learning process, it’s essential to find out about the exception handling mechanism, exceptions hierarchy, the distinction between an error and an exception, etc. When you run the program, something unexpected can happen – it’s called an exception. It makes sense to study them all.Įxception Handling. There are several types of streams: byte streams, character streams, standard streams. ![]() Input/output streams (flows of data) present another piece of Java’s basic knowledge. Still, if you grasp it, you’ll have a competitive advantage compared to other Java learners. Some beginners may find the idea of managing a few threads at once a bit challenging. It means you can solve several tasks concurrently, increasing efficiency and optimizing resource usage. Java allows creating programs consisting of several parts that can be run at the same time. So, it’s helpful to learn about different data structures at this point. The basis of the collection is a data structure: for example, lists, sets, maps, etc. The framework allows you to store or use a particular group of objects. A collection is a single unit of several objects. You must know what class inheritance is, learn about data and behavior abstraction, polymorphism (object’s ability to take many forms), virtual methods, etc. It’s the most crucial concept for the Java language, so you should spend some time digging into it. Concepts of object-oriented programming (OOP). ![]()
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