Package : Packages are java`s way of grouping a verity of classes and/or interfaces together.
Java API packages : java API provides a large number of classes grouped into different packages according to functionality.
Frequently used API packages are as under.
Syntax for import packages is as under
These are known as import statements and must appear at the top of the file, before any file declaration as you can see in our few examples.
Here import is a keyword.
The first statement allows the specified class in the specified package to be imported.
double y = java.lang.Math.sqrt(x);
Here lang is a package, Math is a class and sqrt is a method.
For create new package you can write…
public class Firstclass
body of class