Java 异常

public class TestEx {
    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();
        }
    }
}