java - 带 Switch 语句的 While 循环

Question

我无法让开关不断循环，直到用户告诉程序停止。 当提示用户放入 N 循环时，应将其发送回开关顶部

        char stop;
    while(stop == 'N'){
        switch(choice){
            case 1:
                System.out.println("Enter the time in seconds:");
                time = input.nextInt();
                displacement = (Math.pow(time,4)) + 16;
                System.out.println("Felix's displacement is equal to " + displacement + " meters");
                System.out.println("Stop the application(Y/N)");
                stop = input.findWithinHorizon(".",0).charAt(0);
                break;
            case 2:
                System.out.println("Enter the time in seconds:");
                time = input.nextInt();
                velocity = 4*(Math.pow(time,3));
                System.out.println("Felix's velocity is equal to " + velocity + " m/s");
                break;
            case 3:
                System.out.println("Enter the time in seconds:");
                time = input.nextInt();
                acceleration = 12*(Math.pow(time,2));
                System.out.println("Felix's acceleration is equal to " + acceleration + " m/(s*s)");
                break;
            default:
                System.out.println("Please select a choice");

        }            
    }
}

Answer 1

1. 粗略地说:初始化 stop关于声明:

char stop = 'N';

更好:替换您的 while与 do while循环:

做{

} while (stop == 'N')