在java中，如果用户输入'YES'，我如何继续程序，如果用户输入'NO'则关闭它？

Question

您好，我正在尝试制作一个程序，当您运行该程序时，它就像您与机器人交谈，机器人会问一些关于您自己的问题，但我已经包含了一个部分，它会询问您是否愿意继续，但后来我被卡住了如果用户输入“否”，如何使程序继续运行或关闭。到目前为止，这是我所有的代码：

/********************
*Husnain Sheraz
*06/08/17
*To test knowledge
*Home
********************/




import java.util.concurrent.TimeUnit;
import java.util.Scanner;
public class reviseJava{

    public static void main(String[] args)
    throws InterruptedException {
        //Introduction just saying my name.
        printWithDelays("Hello my name is HUS9.EXE", TimeUnit.MILLISECONDS, 100);

        TimeUnit.SECONDS.sleep(2);

        //Asking user's name and printing it.

        //start a new line
        System.out.println("");

        Scanner scan = new Scanner(System.in);

        //A prompt for the user to enter his name.
        printWithDelays("What's your name?", TimeUnit.MILLISECONDS, 100);

        //reads the next letters (string) the user presses before hitting enter.
        String usersName = scan.nextLine();

        //printing out the word hello and what ever the user inputted as his/hers name.
        printWithDelays("Hello " + usersName, TimeUnit.MILLISECONDS, 100);

        TimeUnit.SECONDS.sleep(1);


        printWithDelays(" i'm going to ask you some basic questions about yourself. If you would like to continue please type 'YES' if you would not like to continue please type 'NO'.", TimeUnit.MILLISECONDS, 100);

        printWithDelays("Would you like to continue?", TimeUnit.MILLISECONDS, 100);

        String answer = scan.nextLine();

    }














public static void printWithDelays(String data, TimeUnit unit, long delay)
        throws InterruptedException {
    for (char ch:data.toCharArray()) {
        System.out.print(ch);
        unit.sleep(delay);
    }
    }

}

Answer 1

你可以使用

System.exit(0) 

当匹配到“否”时

Answer 2

您可以将System.exit(0); 放在 if 语句中以结束您的程序

Answer 3

您应该使用if 语句检查该值：

if(answer.equals("NO")){
    return;
}

如果用户输入“NO”，这将退出程序，否则继续。

Answer 4

让你的代码在 while 循环中运行

  public static void main(String[] args){
  Scanner scan = new Scanner(System.in);
    String input="";

    While(!(input=scan.nextLine()).equals("NO")){

    // your code goes here
    System.out.println("input not NO");
    }
}