我正在制作一个 Zork 克隆，每当它循环时，Eclipse 中就会出现一个错误：
import java.util.Scanner;
public class Level1 {
public static void main(String[] args) {
int x;
for(x=1; x<10; x++) {
System.out.println ("Welcome to Sork - by Wyatt Lucas");
System.out.println (" ");
System.out.println ("Do you want to play?");
Scanner first = new Scanner(System.in);
@SuppressWarnings("unused")
String firstInput;
firstInput = first.nextLine();
System.out.println("Well, it doesn't matter!");
System.out.println("Use commands such as LOOK and GO NORTH \nto complete your adventure.");
System.out.println("");
System.out.println("You are in a room.");
Scanner second = new Scanner(System.in);
String secondInput = second.nextLine();
String look = "look";
if(secondInput.equalsIgnoreCase(look)) {
System.out.println("You look around and see a DOOR \nand a KEY on the floor.");
}
else {
//don't use System.err.println. Just use System.out.println
System.out.println("I do not understand that.");
continue;
}
Scanner third = new Scanner(System.in);
String thirdInput = third.nextLine();
String pick_up_key = "pick up key";
if(thirdInput.equalsIgnoreCase(pick_up_key)) {
System.out.println("You picked up the KEY.");
} else {
System.out.println("I do not understand that.");
continue;
}
Scanner fourth = new Scanner(System.in);
String fourthInput = fourth.nextLine();
String open_door = "open door";
if(fourthInput.equalsIgnoreCase(open_door)) {
System.out.println ("You open the door and are immediately \neaten by a grue!");
} else {
System.out.println("I do not understand that.");
}
first.close();
second.close();
third.close();
fourth.close();
try {
Thread.sleep(1997);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}