One topic you think is THE MOST important to master in JAVA

Question

I know as far as a language is concerned every thing is important, but if you have to give just one name what would you suggest.
THE MOST important topic that every one must & should master in.

Answer 1

The most important topic is the one that helps you to build your specific application and solves your problems. So no one will be able to tell you what's important for you in general.

Answer 2

Thx luka 😊

Answer 3

most important is to understand what is happening how codes work. this might sound as not very important but it is.

Answer 4

MOST IMPORTANT
System.out.println("Hello World");
without this, no one would have started coding.

Answer 5

OOPS concepts