Computers & IT (Non-Engg)

Initcomponents is a method that NetBeans swing designer creates to initialize components. It doesn't really have anything to do with the JFrame class.
You can call the method whenever you like. For Java, it is just like any other method. The NetBeans IDE, however, calls it inside the constructor to control the parameters you have passed via your GUI editor of Netbeans. It is by default private.
You can think of it as the connection between the GUI Editor and Java. So if you remove it, probably you will not be able to use the functionality that NetBeans provides to work with components.

You can go for MCA. If you are interested in management, then you can go for MBA.

The MCA degree is only available in India. Similar programs using different notations are available. You need to check the programs to know if you would be interested to pursue the same such as MS IT or MS CS. Can you mention your marks?

Yes, programming is taught in B.Sc in cyber security course.

You need to first decide your interest. One can do ethical hacking after class 12th but you can also do it after graduation. After completing your graduation, ethical hacking will have more worth.

MCA duration is 3year. but in the corresponding MCA its depend on institutions. some institute provide 2year for corresponding MCA. the fees also depend on institutions. the minimum MCA course fee 2.5-3.0lk, 35-45k per sem.

Yes, it is a 3 year Bachelor degree course.