java - 无法使用扫描器类从静态 block 读取输入

Question

我想从静态块中的用户读取数据并需要检查那里的某些条件但是当我尝试调用 nextInt() 时它会导致一些错误

public class Test {
    static int B,H;
    static{
        Scanner s=new Scanner(System.in);
        B=H=0;
        B=s.nextInt();
        H=s.nextInt();
        s.close();
    }
}

Exception in thread "main" java.lang.ExceptionInInitializerError

Caused by: java.util.NoSuchElementException at java.util.Scanner.throwFor(Scanner.java:862) at java.util.Scanner.next(Scanner.java:1485) at java.util.Scanner.nextInt(Scanner.java:2117) at java.util.Scanner.nextInt(Scanner.java:2076) at Solution.initialise(Solution.java:21) at Solution.(Solution.java:15)

Answer 1

public class App {
    static int B, H;
    static {
        Scanner s = new Scanner(System.in);
        B = H = 0;
        B = s.nextInt();
        H = s.nextInt();
        s.close();
    }

    public static void main(String[] args) {

    }
}