Why we use package in java?

Answer 1

A java package is a group of similar types of classes, interfaces and sub-packages.Such as io package contains buffered reader class which is used to input data from the user , math for different mathematical functions.

Even u can make a package that contains classes of programs u need most which will save your time.

Answer 2

Java packages are not only used to organize and group your code, but also to help prevent naming collisions in the same way a namespace does in other languages such as C++ and C#.