Java 异常

public class Main {
    public static void main(String[] args){
        int[] arr = {1, 2, 3 };
        System.out.println(arr[2]);
        try {
            System.out.println(2/0);
        } catch (ArithmeticException e){
            System.out.println(
            "系统正在维护，请与管理员联系");
            e.printStackTrace();
        }
    }
}