如何一直捕获异常，直到它'；正确的java

我正在编写一个使用Scanner类的程序，并希望使用try-catch块捕获输入不匹配异常。这是我写的：

public class StudentInfo{

 public static void main(String[] args){
    Scanner scnr = new Scanner(System.in);
    int creditHours = 0;
    try
     {
       System.out.println("Please enter the number of credit hours that you currently have (do not count credit hours from classes that you are currently attending this semester)");
       creditHours = scnr.nextInt();
     }
    catch(InputMismatchException e){
       System.out.println("CLASSIFICATION ERROR: NUMBER NOT RECOGNIZED. ENTER AN INTEGER FOR CREDIT HOURS");
       Scanner input = new Scanner(System.in);
       creditHours = input.nextInt();
    }
    String studentClass = checkStudent (creditHours);
    System.out.println("Official Student Classification: " + studentClass);
    }

try-catch块只工作一次，如中所示，如果我第一次输入24.5，它会捕获异常并让用户重新键入他们的信用小时数，但如果他们第二次重新键入非整数，它将无法再次捕获错误并发送相应的消息。因此，本质上，我想知道是否有任何方法可以让它捕获异常并发送错误消息，无论他们尝试了多少次。我尝试过使用do-while循环或while语句，但它不起作用。另外，我在catch块中创建了一个新的scanner变量，因为如果不是，它不允许我在出于某种原因发出错误消息后输入一个新的整数。它实际上会抛出我键入的错误，然后继续给我Java的InputMismatchException错误

以下是我使用while循环的尝试：

int creditHours = 0;
    while(creditHours <= 0){
    try
     {
       System.out.println("Please enter the number of credit hours that you currently have (do not count credit hours from classes that you are currently attending this semester)");
       creditHours = scnr.nextInt();
     }
    catch(InputMismatchException e){
       System.out.println("CLASSIFICATION ERROR: NUMBER NOT RECOGNIZED. ENTER AN INTEGER FOR CREDIT HOURS");
       Scanner input = new Scanner(System.in);
       creditHours = input.nextInt();
    }
   }

    String studentClass = checkStudent (creditHours);
    System.out.println("Official Student Classification: " + studentClass);
  }

int creditHours=0；
while（creditHours您需要try-catch处于循环中，以便重新运行代码

试试这个：

 public class StudentInfo{

 public static void main(String[] args){

    int creditHours = 0;
    boolean ok = false;
    System.out.println("Please enter the number of credit hours that you currently have (do not count credit hours from classes that you are currently attending this semester)");

    while (!ok)
    {
        try
         {
           Scanner scnr = new Scanner(System.in);
           creditHours = scnr.nextInt();
           ok = true;
         }
        catch(InputMismatchException e){
           System.out.println("CLASSIFICATION ERROR: NUMBER NOT RECOGNIZED. ENTER AN INTEGER FOR CREDIT HOURS");
        }
    }


    String studentClass = checkStudent (creditHours);
    System.out.println("Official Student Classification: " + studentClass);
    }

try/catch不是循环。如果想要循环行为，必须添加循环。例如，
while（1）{try…catch…}
@MarcB正如我在问题中所说，我已经做了一段时间和一段时间的循环，但两个循环都不起作用。它的作用完全相同。那么，展示你的循环尝试。@MarcB它已经在那里了，在他的问题的底部。非常感谢！！！它起作用了，我完全理解它。非常感谢！