GPA calculator using collections in Java

We have created small program for creating GPA, which is working absolutely perfect for my scenario if you have any suggestion please provide same in below comment.

GPA Calculation using Java

```package com.onlinetutorials.tech;
import java.util.Scanner;
public class OnlineTutorialGPACalculator {
public static void main(String args[]) {
Scanner onlineTutorialsInput1 = null, onlineTutorialsInput2 = null, onlineTutorialsInput3 = null;
try {
double studentProvidedInput = 0;
int studiedClasses, totalHours, entredInputForTotalHouors = 0;
onlineTutorialsInput1 = new Scanner(System.in);
System.out.println("===Please provide input for number of classses==");
studiedClasses = onlineTutorialsInput1.nextInt();
int totalEarnedHoursByStudentd = 0;
else if (studentGrade.equalsIgnoreCase("A-")) studentProvidedInput = 3.67;
else if (studentGrade.equalsIgnoreCase("B+")) studentProvidedInput = 3.33;
else if (studentGrade.equalsIgnoreCase("B")) studentProvidedInput = 3.0;
else if (studentGrade.equalsIgnoreCase("B-")) studentProvidedInput = 2.67;
else if (studentGrade.equalsIgnoreCase("C+")) studentProvidedInput = 2.33;
else if (studentGrade.equalsIgnoreCase("C")) studentProvidedInput = 2.0;
else if (studentGrade.equalsIgnoreCase("C-")) studentProvidedInput = 1.67;
else if (studentGrade.equalsIgnoreCase("D+")) studentProvidedInput = 1.33;
else if (studentGrade.equalsIgnoreCase("D")) studentProvidedInput = 1.0;
else if (studentGrade.equalsIgnoreCase("D-")) studentProvidedInput = 0.67;
else if (studentGrade.equalsIgnoreCase("F")) studentProvidedInput = 0;
for (int i = 0; i < studiedClasses; i++) {
onlineTutorialsInput2 = new Scanner(System.in);
System.out.println("===Enter hours of studies for this course===");
totalHours = onlineTutorialsInput2.nextInt();
onlineTutorialsInput3 = new Scanner(System.in);
totalEarnedHoursByStudentd += totalHours;
totalEarnedHoursByStudentd += (totalHours * studentProvidedInput);
}