Thread: InputMismatchException

The only data type I'm using is int - so I don't see where this error is coming from. I use the same format in a previous section and I get no errors.

package graduationplanner;
import java.util.Scanner;
import java.util.ArrayList;
 
public class GraduationPlanner {
 
    public static void main(String[] args) {
       Scanner in = new Scanner(System.in);
       final int MINCU = 12;
       final int TUITIONCOST = 2890; //stores value for tuition cost per term
       final int TERMMONTHS = 6; //stores value for number of months in a term
       int sum = 0;
 
       System.out.println("Welcome to the Western Governor's University Graduation Planner! \nWe will calculate the number of terms you have left until graduation, \nalong with the amount of tuition you have left to pay. \nWe will also provide the number of months until graduation! \nLet's get started by asking a few questions.");
       	System.out.println("How many CU's are required for your degree?"); //Prompts user for the total number of CU's for degree and stores in variable
       		int totalCU = in.nextInt(); //storing user input
       		if (totalCU <= 0){ //verification on positive input by user
       			System.out.println("That's not right! Enter a number higher than zero!");
       			System.out.println("How many CU's are required for your degree?");
       			totalCU = in.nextInt(); //stores corrected number
       		}
       		//System.out.println(totalCU); //Outputting number entered for check
 
        ArrayList<Integer> leftCU = new ArrayList<>();
        {
            System.out.println("Please enter one at a time the number of CU's for each class that is left to complete. Enter Q when done.");
            leftCU.add(in.nextInt());
            while (in.hasNextInt()){
                leftCU.add(in.nextInt());}
            for(int i=0; i < leftCU.size(); i++){
            	sum = sum + leftCU.get(i);}
        }
        //System.out.println(leftCU);
        	System.out.println(sum);
 
       System.out.println("How many CU's are you planning on taking per term?"); //Prompts user for the number of CU's per term
       		int perTerm = in.nextInt(); //storing user input
       			if (perTerm < MINCU){ //verification on positive input by user
       				System.out.println("12 CU's are required per term. Try a higher number!");
       				System.out.println("How many CU's are required for your degree?");
       				perTerm = in.nextInt();} //stores corrected number
       			System.out.println(perTerm);
 
 
       int termLeft = sum/perTerm; //Calculates number of terms left
       int totalTuition = termLeft * TUITIONCOST; //Calculates the amount of tuition left to pay
       int monthsLeft = termLeft * TERMMONTHS; //Calculates the number of months left
 
       System.out.println("+----------------------------------------+");
       System.out.println("|Number of Terms left is: " + termLeft + "|");
       System.out.println("|Total amount of Tuition left is: " + totalTuition + "|");
       System.out.println("|Number of Months left is: " + monthsLeft + "|");
       System.out.println("+----------------------------------------+");
       System.out.println("Thank you for using the WGU Graduation Planner");
       }
    }

Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at java.util.Scanner.nextInt(Unknown Source)
at graduationplanner.GraduationPlanner.main(Graduatio nPlanner.java:37)

Post a sample run so that we can duplicate the error.

Never mind - but please do so in the future.

You ask the user to enter a 'Q' to end. What's going to happen when the program is looking for an int but a 'Q' is entered? Hint: You already know the answer.

Originally Posted by GregBrannon

Post a sample run so that we can duplicate the error.

Never mind - but please do so in the future.

You ask the user to enter a 'Q' to end. What's going to happen when the program is looking for an int but a 'Q' is entered? Hint: You already know the answer.

Thanks - I guess because the output began with the next question and the error was also in the next section, I just assumed it had to do with that one, not the previous one. When I removed the whole previous section, it worked. Thanks again. Very new to this.