Package in java with example

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Package in java with example

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When we talk about the package means that we are talking about certain similar things.
Same is in java package, So java package is a collection of similer files, classes, methods etc.
In java , there s two type of package :
1) Built-in package such as java, lang, awt, javax , swing, net, io, etc.
2) User defined package.

Advantage of Java package

1. It removes the naming collision.
2. It provides access protection.
3. Effective way to maintain classes and interface.
Note : It is good practice to give package name in small letter. Example : In below example we have created a package & inside it there is a class then we have created another class in another package and then we imported the package and accessed the class.
package csc_pack; public class Chandan1
{
public void sum(int a, int b)
{
System.out.println("Your sum is :" +(a+b));
}
}
Now import this package in another class :
import csc_pack.Chandan1;
public class Mainclas
{
public static void main(String args[])
{
Chandan1 obj = new Chandan1();
{
obj.sum(3,4);
}
}
}
Output :
Your sum is :7