The core java material you need to learn java development is covered in the first seven sections (around 14 hours in total). The Java Basics are covered in those sections. The rest of the course covers intermediate, advanced, and optional material you do not technically need to go through.
For example section 13 is a whopping 10 hours just by itself and is aimed at those students who want to build desktop applications with graphical user interfaces. JavaFX (which is the technology used in this section) is something that most java developers will rarely or never need to work on. So you could skip that section entirely. But if you are one of the few that need to build user interfaces, then the content is there and ready for you. And there are other sections you can completely avoid if you wish.
If you want to know absolutely everything about Java, then you can go through the entire course if you wish, but it’s not necessary to do so if you are just looking to learn the essential information to get a java developer position.
Why would you choose to learn Java?
The reality is that there is a lot of computer languages out there. It’s in the hundreds. Why would you choose the Java language?
The number one reason is its popularity. According to many official websites that track the popularity of languages, Java is either #1 or in the top 3. Popularity means more companies and their staff are using it, so there are more career opportunities available for you if you are skilled in the language.
Also enroll in this Coding Project