【`try-catch`语句来捕获多层异常】

public class ExceptionHandlingDemo {
    public static void main(String[] args) {
        try {
            // 第一层异常捕获
            try {
                // 第二层异常捕获
                try {
                    // 执行可能会抛出异常的代码
                    int result = divide(10, 0);
                    System.out.println("Result: " + result);
                } catch (ArithmeticException e) {
                    // 捕获第二层异常
                    System.out.println("Caught ArithmeticException: " + e.getMessage());
                }
            } catch (NullPointerException e) {
                // 捕获第一层异常
                System.out.println("Caught NullPointerException: " + e.getMessage());
            }
        } catch (Exception e) {
            // 捕获其他未知异常
            System.out.println("Caught Exception: " + e.getMessage());
        }
    }

    public static int divide(int a, int b) throws ArithmeticException {
        return a / b;
    }
}