This GPA/CGPA calculator code in Java Projects is used to examine the GPA and CGPA of Different universities like FAST, NUML, NUST, LUMS with accuracy with source code. It also guide students in computing their GPA for individual semesters as well as their CGPA across multiple semesters. With its user-friendly interface, you can quickly input your grades and credits to obtain accurate GPA and CGPA values.
Features of GPA/CGPA calculator code
- Calculate GPA: Determine your GPA for a specific semester by inputting the credit hours and grades for each subject.
- Calculate CGPA: Compute your CGPA by entering the GPAs of all your previous semesters.
- Calculation Method: Learn how GPA and CGPA are calculated, providing you with a better understanding of the grading system.
NOTE
Download the Zip File by clicking on download button:
You can also get its code from GitHub Repository:
Step-by-Step Guide to Implementing
Implementing the of GPA calculator in java involves setting up your Java development environment, understanding the structure of the provided code, and writing the necessary Java methods.
Run the Program
Simply execute the Java program provided. The “calculateGPA “method demonstrates how to iterate through subjects, collect grades and credit hours, and calculate the GPA by dividing the total weighted grades by the total credit hours.
Select an Option
Choose from the menu options to calculate GPA, CGPA, learn about the calculation method, or exit the application. The calculateCGPA method accumulates GPA values across semesters and calculates the average, providing a cumulative performance metric. This section explains the differences in calculation and how the program handles multiple semesters.
Input Data
Follow the prompts to enter the required information, such as the number of subjects, credit hours, and grades. This part of the article explains the importance and implementation of input validation in the provided Java code.
Project of GPA Calculator in Java Code: Enhancements
Further enhancing the application can involve adding features such as saving results, user login, or graphical user interfaces (GUIs). This article discusses potential enhancements and how they can be implemented within the Java programming framework.
Conclusion of GPA calculator in java
The GPA Calculator in Java offers a practical solution for students to track their academic progress with ease. Whether you need to determine your GPA for a single semester or calculate your overall performance across multiple semesters, this tool has got you covered.
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FAQ
How does the GPA calculation work in this Java code?
The GPA calculation in the provided Java code works by taking the input of the number of subjects, credit hours, and grades for each subject.
Are there any GUI frameworks recommended for this project?
or a GUI version of the GPA and CGPA calculator, Java Swing and JavaFX are popular choices. Swing is lightweight and suitable for simple applications, while JavaFX offers more modern features and better support for complex UI designs.
How can errors during input validation be effectively handled in Java?
Errors during input validation in Java can be effectively handled by using try-catch blocks to catch exceptions and provide appropriate error messages to the user. Additionally, you can use loops to prompt the user for input until valid data is provided.
Source Code
The source for calculating GPA in java is given as :
import java.util.ArrayList;
import java.util.InputMismatchException;
import java.util.List;
import java.util.Scanner;
class GPACGPAcalculator {
private static Scanner scanner = new Scanner(System.in);
public static void main(String[] args) {
while (true) {
clearScreen();
printHeader("GPA & CGPA Calculator");
System.out.println("1. Calculate GPA");
System.out.println("2. Calculate CGPA");
System.out.println("3. How GPA & CGPA are calculated");
System.out.println("4. Exit");
System.out.print("\nEnter your choice: ");
int choice = inputValidation("");
switch (choice) {
case 1:
calculateGPA();
break;
case 2:
calculateCGPA();
break;
case 3:
displayMethod();
break;
case 4:
exitApplication();
return;
default:
System.out.println("Invalid choice. Please enter a valid option.");
break;
}
System.out.println("\nPress Enter to continue...");
scanner.nextLine(); // Wait for user to press enter
}
}
private static void clearScreen() {
// Clear the screen - simulated by printing new lines
for (int i = 0; i < 50; ++i) System.out.println();
}
private static void printHeader(String title) {
System.out.println(String.format("%50s", "").replace(' ', '-'));
System.out.printf("%-25s%s%n", "", title);
System.out.println(String.format("%50s", "").replace(' ', '-'));
System.out.println();
}
private static void calculateGPA() {
clearScreen();
printHeader("GPA Calculation");
System.out.print("Enter the number of subjects: ");
int numSubjects = inputValidation("");
List<Float> credits = new ArrayList<>();
List<Float> grades = new ArrayList<>();
float totalCredits = 0, weightedSum = 0;
for (int i = 0; i < numSubjects; ++i) {
System.out.print(" credit hours for subject " + (i + 1) + ": ");
float credit = inputValidation("");
credits.add(credit);
System.out.print(" grade (Numbers) for subject " + (i + 1) + ": ");
float grade = inputValidation("");
grades.add(grade);
weightedSum += credit * grade;
totalCredits += credit;
}
System.out.printf("Your GPA is: %.2f%n", weightedSum / totalCredits);
}
private static void calculateCGPA() {
clearScreen();
printHeader("CGPA Calculation");
System.out.print("Enter the number of semesters: ");
int numSemesters = inputValidation("");
float sumGPA = 0;
for (int i = 0; i < numSemesters; ++i) {
System.out.print("Enter GPA for semester " + (i + 1) + ": ");
sumGPA += inputValidation("");
}
System.out.printf("Your CGPA is: %.2f%n", sumGPA / numSemesters);
}
private static void displayMethod() {
clearScreen();
printHeader("Calculation Method");
System.out.println("GPA is calculated as the sum of (credit hours * grade points) for all subjects, divided by the total credit hours.");
System.out.println("CGPA is the average of GPA calculated across all semesters.\n");
}
private static void exitApplication() {
clearScreen();
System.out.println("Thank you for using the GPA & CGPA Calculator. Goodbye!");
}
private static int inputValidation(String prompt) {
int input = -1;
boolean valid = false;
while (!valid) {
try {
if (!prompt.isEmpty()) System.out.print(prompt);
input = scanner.nextInt();
if (input >= 0) {
valid = true;
} else {
System.out.print("Invalid input. Please enter a positive number: ");
}
} catch (InputMismatchException e) {
System.out.print("Invalid input. Please enter a positive number: ");
scanner.next(); // consume the invalid input
}
}
scanner.nextLine(); // consume the rest of the line
return input;
}
}