如何在switch里面停止循环？

Question

怎么能在case9里面结束循环
不再显示

Please choose from one of the following menu options -

1) Display levels and hourly rates of consultants

2) Display levels and hourly bill rates of consultants

3) Staff project

4) Display project staffing proposal

5) Calculate profit

9) Submit project staffing proposal and exit option:

让结果显示如下：

这是我现在的代码

public static int displayMenu() {
Scanner input = new Scanner(System.in);

    while (true) {
        System.out.println();
        System.out.println("Please choose from one of the following menu options -");
        System.out.println("1) Display levels and hourly rates of consultants");
        System.out.println("2) Display levels and hourly bill rates of consultants");
        System.out.println("3) Staff project");
        System.out.println("4) Display project staffing proposal");
        System.out.println("5) Calculate profit");
        System.out.println("9) Submit project staffing proposal and exit");
        System.out.println("option:");
        int option = input.nextInt();
        switch (option) {
  case 9:
            System.out.println("You have successfully submitted your project proposal. Good-bye! ");
            break;

Answer 1

boolean loop = true;

while(loop)

case 9:
    loop = false;
    break;