https://www.udacity.com/course/object-oriented-programming-in-java--ud283 https://beginnersbook.com/java-tutorial-for-beginners-with-examples/ https://www.coursera.org/learn/object-oriented-java?ranMID=40328&ranEAID=SAyYsTvLiGQ&ranSiteID=SAyYsTvLiGQ-29tDkJq_MFdgmJDSiq2LNw&siteID=SAyYsTvLi...