1) It hides Classes and Interfaces in a subdirectory so that accidental deletion is not possible

2) The Classes of one Package are isolated from the Classes of another Packages this means we can
use same name for the classes in 2 different Packages

3) Packages provide resuability, this make software develop easily. The productivity of a program may increase because of reusability

4) Once a package is created it can be extended (or) a new package can be created

Syntax :
package package-name;

You Must compile the package with the Command javac -d (-d indicates the directory)

## Sample Program of Java Package is

//Creating a package:pack

package pack;
public class Addition
{
double d1,d2;
public Addition(double d1,double d2)
{
this.d1=d1;
this.d2=d2;
}
public void sum()
{
System.out.println(“sum=”+(d1+d2));
}
}

Compile this with the Command

javac -d Addition.java

## Sample 2#

//Using the package-pack

class use
{
public static void main(String args[])
{
pack.Addition obj=new Addition(10,15.5);
obj.sum();
}
}