What is package in the beginning of a java document?

Question

I found some useful samples in github about searchable dictionary.

Every java file in the searchable dictionary folder starts with

package com.example.android.searchabledict;

What does package do and how should I use it?

Answer 1

Package objects contain version information about the implementation and specification of a Java package.Package it imports the class or set of class.The package are stored in the manifest file. For more details please go through the link .https://developer.android.com/reference/java/lang/Package.html