Dart编程实例 - 自定义异常

本文为大家分享 Dart编程实例 - 自定义异常 的具体示例代码,提供大家参考,具体内容如下:

class AmtException implements Exception {
   String errMsg() => 'Amount should be greater than zero';
}  
void main() {
   try {
      withdraw_amt(-1);
   }
   catch(e) {
      print(e.errMsg());
   }  
finally {
      print('Ending requested operation.....');
   }
}  
void withdraw_amt(int amt) {
   if (amt <= 0) {
      throw new AmtException();
   }
}

本文为大家分享 Dart编程实例 - 添加断点 的具体示例代码,提供大家参考,具体内容如下:void main() { int a = 10, b = 20, c = 5; c = c * c * c; pr ...