inputmismatchexception

Try-Catch inside While Loop

由 怎甘沉沦 提交于 2019-12-11 18:52:55
问题 The code below asks the user how many racers he/she would like. while (true) { // loops forever until break try { // checks code for exceptions System.out.println("How many racers should" + " participate in the race?"); amountRacers = in.nextInt(); break; // if no exceptions breaks out of loop } catch (InputMismatchException e) { // if an exception appears prints message below System.err.println("Please enter a number! " + e.getMessage()); continue; // continues to loop if exception is found

exceptions and infinite loops

由 半世苍凉 提交于 2019-12-11 12:19:29
问题 // Precondition: number provided is a positive integer // Postcondition: returns a integer of length 4 public static int validateNumber(int num, Scanner scan) { int number = num; while(number < 1000 || number > 9999) { try { System.out.print("Number must be 4 digits long. Please provide the number again: "); number = scan.nextInt(); // reads next integer provided scan.nextLine(); } catch(InputMismatchException e) //outputs error message if value provided is not an integer { System.out.println

Asking user to enter the input again after he gives a wrong value for the Input. InputMismatchException?

由 点点圈 提交于 2019-12-10 21:31:57
问题 I have created the following class for Inputting a user's age and then displaying appropriate info in the console. On running this program , the console asks "Please Enter your Age : " If the user enters an Integer for eg: 25 , the executed class displays " Your age is : 25" in the console. If the user enters a non-integer number , the console displays: Age should be an Integer Please Enter your Age: But I am not able to enter anything through the keyboard when I place my cursor next to

“Exception in thread ”main“ java.util.InputMismatchException”**

由 本秂侑毒 提交于 2019-12-02 15:34:36
问题 I have searched but i really can' t seem to find anything wrong in the code, please help! The code compiles but, this is the error i get when i want to answer question 3: 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.nextDouble(Unknown Source) at ForgetfulMachine.main(ForgetfulMachine.java:16) And this is my code: import java.util.Scanner; public class ForgetfulMachine {

Cannot Figure out how to catch InputMismatchException

由 让人想犯罪 __ 提交于 2019-12-02 14:34:22
问题 So here is my current code for catching an InputMismatchException error int weapon = 0 boolean selection = true; while(selection) { try { System.out.println("Pick number 1, 2, or 3."); weapon = scan.nextInt(); selection = false; } catch(InputMismatchException e) { System.out.println("Choose 1,2,3"); weapon = scan.nextInt(); } } I'm trying to make sure that an int is entered and not anything else. Scanner class as already been implemented and 'scan' will act as it for me. Thanks for any

Input mismatch when reading double from file

由 ε祈祈猫儿з 提交于 2019-12-02 11:48:47
问题 I have to write a program that will read the names and balances from text file "balances.txt" and organize into a report that will then sum up the balances into a total. This is what the file contains: JAKIE JOHNSON,2051.59 SAMUEL PAUL SMITH,10842.23 ELISE ELLISON,720.54 I had originally written the code which gave me exactly what I wanted, but was told not use loops, arrays, or parseDouble . I've now tried the following, but I keep getting an error every time I used nextDouble . The code:

Input mismatch when reading double from file

由 淺唱寂寞╮ 提交于 2019-12-02 07:04:12
I have to write a program that will read the names and balances from text file "balances.txt" and organize into a report that will then sum up the balances into a total. This is what the file contains: JAKIE JOHNSON,2051.59 SAMUEL PAUL SMITH,10842.23 ELISE ELLISON,720.54 I had originally written the code which gave me exactly what I wanted, but was told not use loops, arrays, or parseDouble . I've now tried the following, but I keep getting an error every time I used nextDouble . The code: import java.io.File; import java.text.NumberFormat; import java.text.DecimalFormat; import java.io

Scanner for long integer, Exception in thread “main” java.util.InputMismatchException

由 穿精又带淫゛_ 提交于 2019-11-29 18:07:06
I am at the last step to finalize my program, however whenever I enter my integer (long) I get a input mismatch: Compiler message: "Exception in thread "main" java.util.InputMismatchException: For input string: "4388576018402626" at java.util.Scanner.nextInt(Scanner.java:2097) at java.util.Scanner.nextInt(Scanner.java:2050) at CreditCardValidation.main(CreditCardValidation.java:12)" My code is as follows: import java.util.Scanner ; //import Scanner public class CreditCardValidation { public static void main (String[] args){ Scanner kbd = new Scanner(System.in) ; System.out.println("Please

Scanner for long integer, Exception in thread “main” java.util.InputMismatchException

由 时光怂恿深爱的人放手 提交于 2019-11-28 12:07:40
问题 I am at the last step to finalize my program, however whenever I enter my integer (long) I get a input mismatch: Compiler message: "Exception in thread "main" java.util.InputMismatchException: For input string: "4388576018402626" at java.util.Scanner.nextInt(Scanner.java:2097) at java.util.Scanner.nextInt(Scanner.java:2050) at CreditCardValidation.main(CreditCardValidation.java:12)" My code is as follows: import java.util.Scanner ; //import Scanner public class CreditCardValidation { public

Exception in thread “main” java.util.InputMismatchException

由 旧时模样 提交于 2019-11-26 11:34:58
问题 i need help with one exercise in java, i\'m stuck on this error 2 hours maybe. Any help would be great. Exception in thread \"main\" java.util.InputMismatchException at java.util.Scanner.throwFor(Scanner.java:909) at java.util.Scanner.next(Scanner.java:1530) at java.util.Scanner.nextInt(Scanner.java:2160) at java.util.Scanner.nextInt(Scanner.java:2119) at prodavnica.Prodavnica.main(Prodavnica.java:60) Java Result: 1 package prodavnica; public class Proizvod { private String ime_proizvod;
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