In this article we will show you, How to write Java Program to find Volume and Surface Area of Cuboid with example. Before we step into the program, Let see the definitions and formulas behind Area of Top & Bottom Surfaces, Surface area of a Cuboid, Lateral Surface Area and Volume of a Cuboid
Cuboid
Cuboid is a 3D object made up of 6 Rectangles. All the opposite faces (i.e Top and Bottom) are equal.
Surface Area of a Cuboid
The Total Surface Area of a Cuboid is the sum of all the 6 rectangles areas present in the Cuboid. If we know the length, width and height of the Cuboid then we can calculate the Total Surface Area using the formula:
- Area of Top & Bottom Surfaces = lw + lw = 2lw
- Area of Front & Back Surfaces = lh + lh = 2lh
- Area of both sides = wh + wh = 2wh
The Total Surface Area of a Cuboid is the sum of all the 6 faces. So, we have to add all these area to calculate the final Surface Area
- Total Surface Area of a Cuboid = 2lw + 2lh + 2wh
- It is equal: Total Surface Area = 2 (lw + lh +wh)
Volume of a Cuboid
The amount of space inside the Cuboid is called as Volume. If we know the length, width and height of the Cuboid then we can calculate the Volume using the formula:
- Volume of a Cuboid = Length * Breadth * Height
- Volume of a Cuboid = lbh
- The Lateral Surface Area of a Cuboid = 2h (l + w)
Java Program to find Volume and Surface Area of Cuboid
This Java program allows user to enter the length, width and height of a Cuboid. Using these values, program will calculate the Volume, Surface Area and Lateral Surface Area of Cuboid as per the formulas.
JAVA CODE
// Java Program to find Volume and Surface Area of Cuboid
package SurfaceAreaPrograms;
import java.util.Scanner;
public class VolumeOfCuboid {
private static Scanner sc;
public static void main(String[] args) {
// LSA = Lateral Surface Area of a Cube, SA = Surface Area
float length, width, height, SA, Volume, LSA;
sc = new Scanner(System.in);
System.out.println("\n Please Enter the Length of a Cuboid : ");
length = sc.nextFloat();
System.out.println("\n Please Enter the Width of a Cuboid : ");
width = sc.nextFloat();
System.out.println("\n Please Enter the Height of a Cuboid : ");
height = sc.nextFloat();
SA = 2 * (length * width + length * height + width * height);
Volume = length * width * height;
LSA = 2 * height * (length + width);
System.out.format("\n The Surface area of a Cuboid = %.2f", SA);
System.out.format("\n The Volume of a Cuboid = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cuboid = %.2f", LSA);
}
}
OUTPUT
ANALYSIS
Following statement will allow the User to enter the length, width and height of a cuboid and then we are assigning the user entered values to already declared variable called length, width and height.
System.out.println("\n Please Enter the Length of a Cuboid : ");
length = sc.nextFloat();
System.out.println("\n Please Enter the Width of a Cuboid : ");
width = sc.nextFloat();
System.out.println("\n Please Enter the Height of a Cuboid : ");
height = sc.nextFloat();
Next, we are using the Mathematical Formula to calculate the surface area of a Cuboid
SA = 2 * (length * width + length * height + width * height);
In the next line, We are calculating the volume of a Cuboid
Volume = length * width * height;
In the next line, We are calculating the Lateral Surface Area of a Cuboid
LSA = 2 * height * (length + width);
Following System.out.format statements will help us to print the Volume of a Cuboid, Lateral Surface Area of a Cuboid and Surface Area of a Cuboid
System.out.format("\n The Surface area of a Cuboid = %.2f", SA);
System.out.format("\n The Volume of a Cuboid = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cuboid = %.2f", LSA);
From the above screenshot you can observe that, We have entered the Values Length = 10, Width = 6 and Height = 8
The Volume of a Cuboid for the specified Measures are:
Volume of a Cuboid = lbh = l * w * h
Volume of a Cuboid = length * width * height
Volume of a Cuboid = 10 * 6 * 8
Volume of a Cuboid = 480
The Volume of a Cuboid is 480
The Total Surface Area of a Cuboid for the specified Measures are:
Total Surface Area of a Cuboid = 2lw + 2lh + 2wh ==> 2 (lw + lh +wh)
Total Surface Area of a Cuboid = 2* (length * width + length * height + width * height)
Total Surface Area of a Cuboid = 2 * ( (10 * 6) + (10 * 8) + (6 * 8) )
Total Surface Area of a Cuboid = 2 * (60 + 80 + 48) ==> 2 * (188) ==> 376
The Total Surface Area of a Cuboid is 376
The Lateral Surface Area of a Cuboid for the specified Measures are:
Lateral Surface Area of a Cuboid = 2lh + 2wh ==> 2h (l + w)
Lateral Surface Area of a Cuboid = 2 * height * (length + width)
Lateral Surface Area of a Cuboid = 2 * 8 * (10 + 6)
Lateral Surface Area of a Cuboid = 2 * 8 * (16 ) ==> 256
The Lateral Surface Area of a Cuboid is 156
Java Program to find Volume and Surface Area of Cuboid using Functions
This Java program allows user to enter the length, width and height of a Cuboid. Using these values, it will calculate the Volume, Surface Area and Lateral Surface Area of Cuboid as per the formulas. In this example, we are going to use the logic that we specified in first example but we will separated the logic and place it in a method.
JAVA CODE
package SurfaceAreaPrograms;
import java.util.Scanner;
public class VolumeOfCubeUsingMethods {
private static Scanner sc;
public static void main(String[] args) {
// LSA = Lateral Surface Area of a Cube, SA = Surface Area
float length;
sc = new Scanner(System.in);
System.out.println("\n Please Enter the Length of any side of a Cube : ");
length = sc.nextFloat();
VolumeOfCube (length);
}
public static void VolumeOfCube (float length) {
float SA,Volume, LSA;
SA = 6 * (length * length);
Volume = length * length * length;
LSA = 4 * (length * length);
System.out.format("\n The Surface area of a Cube = %.2f", SA);
System.out.format("\n The Volume of a Cube = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cube = %.2f", LSA);
}
}
OUTPUT
Java Program to find Volume and Surface Area of Cuboid using Oops
In this Java program, we are dividing the code using the Object Oriented Programming. To do this, First we will create a class which holds a methods.
JAVA CODE
package SurfaceAreaPrograms;
public class VolumeOfaCuboid {
float SA, Volume, LSA;
public float VolumeOfCuboid (float length, float width, float height) {
Volume = length * width * height;
return Volume;
}
public float SurfaceAreaOfCuboid (float length, float width, float height) {
SA = 2 * (length * width + length * height + width * height);
return SA;
}
public float LateralSurfaceAreaOfCuboid(float length, float width, float height) {
LSA = 2 * height * (length + width);
return LSA;
}
}
Within the Main program, we will create an instance of the above specified class and call the methods.
JAVA CODE
package SurfaceAreaPrograms;
import java.util.Scanner;
public class VolumeOfCuboidUsingClass {
private static Scanner sc;
public static void main(String[] args) {
// LSA = Lateral Surface Area of a Cube, SA = Surface Area
float length, width, height, SA, Volume, LSA;
sc = new Scanner(System.in);
System.out.println(" Please Enter the Length, Width & Height of a Cuboid : ");
length = sc.nextFloat();
width = sc.nextFloat();
height = sc.nextFloat();
VolumeOfaCuboid vcd = new VolumeOfaCuboid();
SA = vcd.SurfaceAreaOfCuboid(length, width, height);
Volume = vcd.VolumeOfCuboid(length, width, height);
LSA = vcd.LateralSurfaceAreaOfCuboid(length, width, height);
System.out.format(" The Surface area of a Cuboid = %.2f", SA);
System.out.format("\n The Volume of a Cuboid = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cuboid = %.2f", LSA);
}
}
OUTPUT
ANALYSIS
VolumeofACuboid Class Analysis:
- First we declared a function VolumeofCuboid with three argument. Within the function, we are calculating the Volume of a Cuboid and returning the value
- Next, we declared a function SurfaceAreaofCuboid with three argument. Within the function, we are calculating the Surface Area of a Cuboid and returning the value
- Next we declared a function LateralSurfaceAreaofCuboid with three argument. Within the function, we are calculating the Lateral Surface Area of a Cuboid and returning the value
TIP: If you declare a method with void keyword then we can’t return any value. If you want to return any value then replace void with data type and add return keyword.
Main Class Analysis:
First we created an instance / created an Object of the VolumeofACuboid Class
VolumeOfaCuboid vcd = new VolumeOfaCuboid();
Next, we are calling the VolumeofCuboid method by passing three arguments. This is the first method that we created with double data type and this method will calculate Volume of a Cuboid and return a value so, we are assigning the return value to volume variable.
Volume = vcd.VolumeOfCuboid(length, width, height);
Next, we are calling the SurfaceAreaofCuboid method. This is the second method that we created with double data type and this method will calculate Surface Area of a Cuboid and return a value so, we are assigning the return value to SA variable.
SA = vcd.SurfaceAreaOfCuboid(length, width, height);
Next, we are calling the LateralSurfaceAreaofCuboid method. This is the third method that we created with double data type and this method will calculate Lateral Surface Area of a Cuboid and return a value so, we are assigning the return value to LSA variable.
LSA = vcd.LateralSurfaceAreaOfCuboid(length, width, height);
Lastly we used following System.out.format statement to print the Volume of a Cuboid, Lateral Surface Area of a Cuboid and Surface Area of a Cuboid
System.out.format(" The Surface area of a Cuboid = %.2f", SA);
System.out.format("\n The Volume of a Cuboid = %.2f", Volume);
System.out.format("\n The Lateral Surface area of a Cuboid = %.2f", LSA);
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