# Java Program to find Volume and Surface Area of a Cylinder

Write Java Program to find Volume and Surface Area of a Cylinder with example. Before we step into the Java Program to find Volume and Surface Area of a Cylinder, Let see the definitions and formulas behind the Surface Area of a Cylinder, Top Or Bottom Surface Area, Lateral Surface Area and Volume of a Cylinder.

## Java Surface Area of a Cylinder

If we know the radius and height of the cylinder, then we can calculate the surface area of a cylinder using the formula:

Surface Area of a Cylinder = 2πr² + 2πrh (Where r is a radius and h is the height of the cylinder).

## The Java Volume of a Cylinder

The amount of space inside the Cylinder is called Volume. If we know the height of a cylinder then we can calculate the volume of a cylinder using the formula:

• Volume of a Cylinder = πr²h
• The Lateral Surface Area of a Cylinder = 2πrh
• We can calculate the Top Or Bottom Surface Area of a Cylinder = πr²

## Java Program to find Volume and Surface Area of a Cylinder

This Java program allows the user to enter the value of a radius and height. Next, the Java program will calculate the volume of a Cylinder, Lateral Surface Area of a Cylinder, Surface Area of a Cylinder, and Top Or Bottom Surface Area of a Cylinder as per the formula.

```// Java Program to find Volume and Surface Area of a Cylinder

package SurfaceAreaPrograms;

import java.util.Scanner;

public class VolumeOfCylinder {
private static Scanner sc;

public static void main(String[] args) {
// L = Lateral Surface Area of a Cylinder, T = Top Surface Area
double radius, sa, Volume, height, L, T;
sc = new Scanner(System.in);

System.out.println("\n Please Enter the Height of a Cylinder : ");
height = sc.nextDouble();

L = 2 * Math.PI * radius * height;

System.out.format("\n The Surface area of a Cylinder = %.2f", sa);
System.out.format("\n The Volume of a Cylinder = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cylinder = %.2f", L);
System.out.format("\n The Top OR Bottom Surface Area of a cylinder = %.2f", T);
}
}```

The following statements will allow the user to enter the radius and height of a cylinder. Then we are assigning the user entered values to already declared variables called radius and height.

```System.out.println("\n Please Enter the radius of a Cylinder : ");
System.out.println("\n Please Enter the Height of a Cylinder : ");
height = sc.nextDouble();```

Next, we are using the Mathematical Formula to calculate the surface area of a Cylinder

`sa = 2 * Math.PI * radius * (radius + height);`

In the next Java line, We are calculating the volume of a Cylinder

`Volume = Math.PI * radius * radius * height;`

In the next line, We are calculating the Lateral Surface Area of a Cylinder and Top Or Bottom Surface Area of a Cylinder

```L = 2 * Math.PI * radius * height;

The following System.out.format statements will help us to print the Volume of a Cylinder, Lateral Surface Area of a Cylinder, Surface Area of a Cylinder, and Top Or Bottom Surface Area of a Cylinder.

```System.out.format("\n The Surface area of a Cylinder = %.2f", sa);
System.out.format("\n The Volume of a Cylinder = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cylinder = %.2f", L);
System.out.format("\n The Top OR Bottom Surface Area of a cylinder = %.2f", T);```

From the above screenshot, you can observe that we have entered the Radius of a Cylinder = 4 and height = 6

The Surface Area of a Cylinder is

Surface Area of a Cylinder= 2πr² + 2πrh

It can also be written as

Surface Area of a Cylinder = 2πr (r+h)
Surface Area of a Cylinder = 2 * Math.PI * radius * (radius + height)
Surface Area of a Cylinder = 2 * 3.14 * 4 * (4 + 6)
Surface Area of a Cylinder = 251.2

The Volume of a Cylinder is

Volume of a Cylinder = πr²h
Volume of a Cylinder = Math.PI * radius * radius * height
Volume of a Cylinder = 3.14 * 4 * 4 * 6
Volume of a Cylinder = 301.44

The Lateral Surface Area of a Cylinder is

LSA = 2πrh
LSA = 2 * Math.PI * radius * height
LSA = 2 * 3.14 * 4 * 6
LSA = 150.72

The Top Or Bottom Surface Area of a Cylinder is

T = πr²
T = 3.14 * 4 * 4
T = 50.24

NOTE: For the calculation purpose, we have taken π = 3.14 instead of (3.142857142..). So, All the above values are almost equal to program output but may differ at 0.01.

## Java Program to find Volume and Surface Area of a Cylinder using Functions

This Java program allows the user to enter the value of a radius and height. Next, this Java program will calculate the volume of a Cylinder, Lateral Surface Area of a Cylinder, Surface Area of a Cylinder, and Top Or Bottom Surface Area of a Cylinder as per the formula. In this example, we use the logic that we specified in the first example but place it in a method.

```package SurfaceAreaPrograms;

import java.util.Scanner;

public class VolumeOfCylinderUsingMethods {
private static Scanner sc;

public static void main(String[] args) {
sc = new Scanner(System.in);

System.out.println("\n Please Enter the Height of a Cylinder : ");
height = sc.nextDouble();

}
public static void VolumeOfCylinder (double radius, double height) {
// L = Lateral Surface Area of a Cylinder, T = Top Surface Area
double sa, Volume, L, T;
L = 2 * Math.PI * radius * height;

System.out.format("\n The Surface area of a Cylinder = %.2f", sa);
System.out.format("\n The Volume of a Cylinder = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cylinder = %.2f", L);
System.out.format("\n The Top OR Bottom Surface Area of a cylinder = %.2f", T);
}
}```
`````` Please Enter the radius of a Cylinder :
3

Please Enter the Height of a Cylinder :
5

The Surface area of a Cylinder = 150.80
The Volume of a Cylinder = 141.37
The Lateral Surface area of a Cylinder = 94.25
The Top OR Bottom Surface Area of a cylinder = 28.27``````

## Java Program to find Volume and Surface Area of a Cylinder using Oops

In this Java program, we are dividing the Volume and Surface Area of a Cylinder code using the Object-Oriented Programming. To do this, we will create a class that holds methods.

```package SurfaceAreaPrograms;

public class VolumeOfACylinder {
double sa, Volume, L, T;

public double VolumeOfCylinder (double radius, double height) {
return Volume;
}

public double SurfaceAreaOfCylinder (double radius, double height) {
return sa;
}

public double LateralSurfaceAreaOfCylinder (double radius, double height) {
L =  2 * Math.PI * radius * height;
return L;
}

public double TotalSurfaceAreaOfCylinder (double radius) {
return T;
}
}```

Within the Main Java Program to find Volume and Surface Area of a Cylinder program, we will create an instance of the above-specified class and call the methods.

```package SurfaceAreaPrograms;

import java.util.Scanner;

public class VolumeOfCylinderUsingClass {
private static Scanner sc;

public static void main(String[] args) {
double radius, height, sa, Volume, L, T;
sc = new Scanner(System.in);

System.out.println("\n Please Enter the Height of a Cylinder : ");
height = sc.nextDouble();
VolumeOfACylinder vac = new VolumeOfACylinder();

System.out.format("\n The Surface area of a Cylinder = %.2f", sa);
System.out.format("\n The Volume of a Cylinder = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cylinder = %.2f", L);
System.out.format("\n The Top OR Bottom Surface Area of a cylinder = %.2f", T);
}
}```
`````` Please Enter the radius of a Cylinder :
5

Please Enter the Height of a Cylinder :
9

The Surface area of a Cylinder = 439.82
The Volume of a Cylinder = 706.86
The Lateral Surface area of a Cylinder = 282.74
The Top OR Bottom Surface Area of a cylinder = 78.54``````

AreaOfACylinder Class Analysis:

1. First, we declared a function VolumeofCylinder with two argument. Within the Java Program to find Volume and Surface Area of a Cylinder function, we are calculating the Volume of a Cylinder and returning the value.
2. Next, we declared a function SurfaceAreaofCylinder with two arguments. Within the function, we are calculating the Surface Area of a Cylinder and returning the value.
3. Next, we declared a function LateralSurfaceAreaofCylinder with two arguments. Within the function, we are calculating the Lateral Surface Area of a Cylinder and returning the value.
4. Here, we declared a function TotalSurfaceAreaofCylinder with one argument. Within the function, we are calculating the Total Surface Area of a Cylinder and returning the value.

Main Class Analysis:

In this Java Program to find Volume and Surface Area of a Cylinder, we created an instance / created an Object of the AreaOfACylinder Class

`VolumeOfACylinder vac = new VolumeOfACylinder();`

Next, we are calling the VolumeofCylinder method. It is the first method that we created with the double data type, and this method will calculate the Volume of a Cylinder and return a value. So, we are assigning the return value to the volume variable.

`Volume = vac.VolumeOfCylinder(radius, height);`

Next, we are calling the SurfaceAreaofCylinder method. It is the second method that we created with a double data type, and this method will calculate the Surface Area of a Cylinder and return a value. So, we are assigning the return value to the sa variable.

`sa = vac.SurfaceAreaOfCylinder(radius, height);`

Next, we are calling the LateralSurfaceAreaofCylinder method. It is the third method that we created with a double data type. This method will calculate the Lateral Surface Area of a Cylinder and return a value. So, we are assigning the return value to the L variable.

`L = vac.LateralSurfaceAreaOfCylinder(radius, height);`

Next, we are calling the TotalSurfaceAreaofCylinder method. It is the fourth method that we created with a double data type. This method will calculate the Total Surface Area of a Cylinder and return a value. So, we are assigning the return value to the T variable.

`T = vac.TotalSurfaceAreaOfCylinder(radius);`

Lastly, we used the following System.out.format statement to print the Java Volume of a Cylinder, Lateral Surface Area of a Cylinder, Surface Area of a Cylinder, and Top Or Bottom Surface Area of a Cylinder.

```System.out.format("\n The Surface area of a Cylinder = %.2f", sa);
System.out.format("\n The Volume of a Cylinder = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cylinder = %.2f", L);
System.out.format("\n The Top OR Bottom Surface Area of a cylinder = %.2f", T);``` Suresh is the founder of TutorialGateway and a freelance software developer. He specialized in Designing and Developing Windows and Web applications. The experience he gained in Programming and BI integration, and reporting tools translates into this blog. You can find him on Facebook or Twitter.