JavaFirst - program and tutorial 6.9.29

JavaFirst - program and tutorial - The first (initial) course of lectures on Java programming with a detailed explanation of where to start and how to write a program. Instead of a systematic description of all the properties of the language, the code of the demo program is presented and each line is commented on in a similar way.

All the necessary information is reported along the way. The code is a template for creating the appearance of the program (graphical user interface) with a menu setup and a response device for selecting menu sections. Along the way, many basic Java classes and their most used methods are indicated. You can compile the program code and view the running program.