Packages

1)Program to accomplish following task.
i)Create a user-defined package box which has a class definition. For Box having data member and disp() method.
ii)Source file imports above package and calculates the volume of box

Code:

 package box;

 public class Dim

 {

  public float L,B,H,volume;

  public Dim(float l,float b,float h)

  {

   L=l;

   B=b;

   H=h;

  }

  public void show()

  {

  System.out.println("Length = "+L+", Breadth = "+B+", Height = "+H);

  System.out.println("Volume of Box="+volume);

  }

 }

 import box.Dim;

 class Boxdemo

 {

  public static void main(String args[])

  {

   Dim b=new Dim(10,20,30);

   b.volume=b.L*b.B*b.H;

   b.show();

  }

 }

Output:

 C:\Program Files\Java\jdk1.6.0_07\bin>javac Boxdemo.java

 C:\Program Files\Java\jdk1.6.0_07\bin>java Boxdemo

 Length = 10.0, Breadth = 20.0, Height = 30.0

 Volume of Box=6000.0

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2) Creating Package for CD store and using it.

Code:

package MyPackage;

 class CD

 {

  private  String title;

  int length;

  boolean avail;

  CD(String t, int l,boolean a)

  {

   title=t;

   length=l;

avail=a;

}

public void show()

{

System.out.println("\nTitle : "+title + "\nLength : " + length + "\nAvail : "+avail );

}

}

class CDStore

{

public static void main(String args[])

{

CD cd1=new CD("Bhool Bhulaiya", 120, true);

CD cd2=new CD("Dhoom", 120, true);

cd1.show();

cd2.show();

}

}

Output:

Title : Bhool Bhulaiya

Length : 120

Avail : true

Title : Dhoom

Length : 120

Avail : true

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3) Program for creating simple package and importing it.

Code:

package package1;

 public class ClassA

 {

  public void displayA()

  {

   System.out.println("ClassA");

  }

 }

 import package1.ClassA;

 class PackageTest1

 {

public static void main(String args[])

{

ClassA A=new ClassA();

A.displayA();

}

}

Output:

ClassA

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4) Creating a package Factorial for calculating factorial and using it in program.

Code:

package package1;

 public class Factorial

 {

  public Factorial(int x)

  {

   int fact=1 ;

   for(int i=1;i<=x;i++)

   {

     fact=fact*i;

   }

System.out.print(" The Factorial of  "+x+" is : "+fact);

}

}

import package1.Factorial;

class packageDemo

{

public static void main(String args[])

{

Factorial f=new Factorial(5);

}

}

Output:

The Factorial of  5 is : 120