java - 当输入 'q'时结束java程序

Question

如果我输入 q 或 Q，我想结束我的 java 程序。否则，程序将继续运行，打印问题并要求输入。这行得通吗？

Scanner sc = new Scanner(System.in);
while(sc.hasNext())
{
System.out.print("Enter departure city <'Q' or 'q' to exit>: ");
String input = sc.next();

if(!(input.equals('q')) || !(input.equals('Q'))){
//system continues
}
else{
System.exit(0);
}
}

Answer 1

String input = "";

while (!input.toUpperCase().equals("Q"))
{
   System.out.print("Enter departure city. <'Q' or 'q' to exit>: ");
   input = sc.next();
}

while循环后退出。