做一会儿不回头

问题描述

因此，我正在处理一个涉及二进制转换等的问题。但是我的问题是，每当catch块完成执行时，我似乎都无法在代码中制作do-while语句以进行环回。这是我的代码。

System.out.println("This program converts a binary value to its decimal counterpart.\n");
    Scanner input = new Scanner(System.in);
    boolean invalidInput = true;

    do {

        try {
            System.out.print("(>) Enter the value to be converted: ");
            String numberToConvert = input.nextLine();
            long converted = Long.parseLong(numberToConvert,2);
            System.out.println("(>) Decimal value of " + numberToConvert + " is : " + converted + "\n");
            invalidInput = false;
        } catch (Exception e) {
            System.out.println("(!) Entered value is non binary,please try again.\n");
            input.next();
        }

    } while (invalidInput);

解决方法

从catch块中删除input.next（），然后尝试：-

    System.out.println("This program converts a binary value to its decimal counterpart.\n");
    Scanner input = new Scanner(System.in);
    boolean invalidInput = true;

    do {

        try {
            System.out.print("(>) Enter the value to be converted: ");
            String numberToConvert = input.nextLine();
            long converted = Long.parseLong(numberToConvert,2);
            System.out.println("(>) Decimal value of " + numberToConvert + " is : " + converted + "\n");
            invalidInput = false;
        } catch (Exception e) {
            System.out.println("(!) Entered value is non binary,please try again.\n");
        }

    } while (invalidInput);