Question

公共课AppointmentSchedule {

private static final int NUM_APPOINTMENTS = 6;

public static void main(String[] args) {
    // TODO Auto-generated method stub

    String[] scheduled = new String[NUM_APPOINTMENTS];
    Scanner consoleScanner = new Scanner(System.in);
    int i;
    String name;

    for (int z = 0; z < NUM_APPOINTMENTS; z++) {
        scheduled[z] = "";
    }
    System.out.println("To schedule an appointment, Please enter a time between 1PM to 6PM");
    do {
        i = consoleScanner.nextInt();
        try {
            if (i >= 1 && i <= 6) {
                try {
                    if (scheduled[i] == "") {
                        System.out.println("Please enter your name.");
                        name = consoleScanner.next();
                        scheduled[i] = name;
                        System.out.println("Thank you " + name
                                + ", you have been scheduled for " + i
                                + " PM.\n");
                        System.out
                                .println("To schedule an appointment, Please enter a time between 1PM to 6PM");
                    } else {
                        throw new TimeInUseException();
                    }
                } catch (TimeInUseException ex1) {
                    System.out.println(ex1.getMessage());
                }
            } else
                throw new InvalidTimeException();

        } catch (InvalidTimeException ex) {
            System.out.println(ex.getMessage());
        }

    } while ();
    consoleScanner.close();
}

}

在计划[i]填充6个元素之后，有什么技术可以结束do while循环？

看起来像是：while（预定[z]！= 6）？

Answer 1

执行此操作while(i<=5);即使i=6此处i是您继续增加的变量，这也会让您的循环继续运行

Answer 2

只需跟踪用户输入的输入数量即可。这可以通过声明

来完成

int count = 0;

在do...while循环之前

并将其从内部if的主体递增：

if (scheduled[i - 1] == "") {
    System.out.println("Please enter your name.");
    name = consoleScanner.next();
    scheduled[i - 1] = name;
    System.out.println("Thank you " + name
                        + ", you have been scheduled for " + i
                        + " PM.\n");
    count++; /* Note this */
    System.out.println("To schedule an appointment, Please enter a time between 1PM to 6PM");
}

最后，将条件更改为

} while (count < 6);

如何在6个数组输入后停止while循环？

2 个答案: