After considering among other topics, picked Collections (set, list, queue, deque, map). Still on this quite large topic.
Trying examples on JDBC provided in offline Java Tutorial (textual not video) I had downloaded from Oracle, making sure mySQL driver for JDBC I installed worked in my laptop. Yeah.. the driver worked, so the examples ran, so I can explore JDBC in detail next time.
Although I want to play with desktop GUI app using Swing, my priority is using Java for backend of web apps, either using Java EE or Spring framework. Chances are I will also use it for Android development, although I see Kotlin seems to become the recommended option for that purpose as mentioned in the Android website.
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Although I want to play with desktop GUI app using Swing, my priority is using Java for backend of web apps, either using Java EE or Spring framework. Chances are I will also use it for Android development, although I see Kotlin seems to become the recommended option for that purpose as mentioned in the Android website.