如何在 switch 中使用 try catch 一会儿

Question

一旦我运行代码来读取数据，程序执行就不会循环回来。我尝试改变放置 try catch 语句和finally 语句的位置，并且所有中断方式都会继续。    long code;    char choice;    Cars CarSales = new Cars(); //It creates a Java object and allocates memory for it on the heap.    Scanner sc = new Scanner(System.in);    System.out.println("   -----CARS SALES YARD------"); //The println is a method of java.io.PrintStream.    do {        System.out.println("1. Add item");        choice = sc.nextLine().charAt(0);        switch (choice) {     //switch statement allows a variable to be tested for equality against a list of values.         case '6':            try{            CarSales.ReadData();            continue;            }            catch(IOException e){                     System.out.println("Error reading file '" );                     continue;            }        default:            System.out.println("Invalid Selection\n");        }    } while (choice != '6'); //while loop statement repeatedly executes a statement as long as a given condition is true    sc.close();public void ReadData() throws IOException{//This Method is in the Cars classString fileName = "input.txt";String line = null;FileReader fileReader = new FileReader(fileName);BufferedReader bufferedReader = new BufferedReader(fileReader);while((line = bufferedReader.readLine()) != null) {            System.out.println(line);    }   bufferedReader.close();   System.out.println("TRY");尽管程序执行只是停止循环，但没有错误消息。

Answer 1

通过continue;将移至后catch。喜欢，

do {

    System.out.println("1. Add item"); //<-- where are 2-6?

    choice = sc.nextLine().charAt(0);

    switch (choice) {

    case '6': // <-- don't forget case '1' - '5'

        try {

            CarSales.ReadData();

        } catch (IOException e) {

            System.out.println("Error reading file '");

        }

        continue; // <-- here, or a break;

    default:

        System.out.println("Invalid Selection\n");

    }

} while (choice != '6');