📅  最后修改于: 2022-03-11 14:52:30.033000             🧑  作者: Mango
Import basically means you're adding a Library/Package full of classes and methods that are premade for ease of use. Java.IO is standard for Java Input/Output. So in essence you're importing extra Input/Output functionality. The asterisk on the end means you're importing everything in the Java.IO Package.