//拋出異常示例。
// 手動拋出異常.
class DemonThrow {
  public static void main(String args[]) {
    try {
      System.out.println("Before throw.");
      throw  new  ArithmeticException();
    }
    catch (ArithmeticException  e) {
      // 捕捉異常
      System.out.println("Exception  caught.");
    }
    System.out.println("After try-catch statement.");
  }
}