幾個(gè)月前我開始研究 Java，現(xiàn)在我陷入了異常處理中，我需要的是，每個(gè)StudentId、TeamID 都必須拋出一輪異常檢查，以便如果用戶輸入字母而不是整數(shù)，它應(yīng)該發(fā)送回在同一個(gè)地方再次詢問那個(gè)值。我正在使用 ArrayList 來存儲(chǔ)數(shù)據(jù)。此外，所有g(shù)et************() 方法都在另一個(gè)名為Student 的類中。studentList是我訪問我的ArrayList 的變量請(qǐng)通過修復(fù)它來幫助我找到我的錯(cuò)誤在哪里，以便我的概念更加清晰。我被困在這里/*** * A method to check if the same Student ID exists in the ArrayList previously * @param StudentId * @return */public static boolean checkStudent(int StudentId) {    for (Student stud : studentList) {        if(stud.getStudentId() == StudentId) {            return true;        }    }    return false;}/*** * Method to add student in the ArrayList * @param scn */public static void addStudent(Scanner scn) {    System.out.println("Enter student ID");    int studentId;    studentId = scn.nextInt();    **//enter the try catch statement here     //ask the user to write the integer not string and revert to this scanner variable**    if (checkStudent(studentId)) {        System.out.println("Student Id " + studentId + " already exists,Please enter the valid details ");        addStudent(scn);        //break;   }else{       System.out.println("Enter student name:");       String studentName;       studentName = scn.next();       System.out.println("Enter team ID:");        **try{        int teamId;       teamId = scn.nextInt();        //ask the user to write the integer not string and revert to this scanner variable       }catch(NumberFormatException e){           //       }finally{        //do something            }**        System.out.println("Enter team name:");       String teamName;try{       teamName = scn.next();           }       Student std = new Student(studentId, studentName, teamId, teamName);       studentList.add(std);       System.out.println("*******************************************");       System.out.println("student with Student ID" + studentId +" added succesfully");       System.out.println("*******************************************");      }}