异常

  
  

   
   
   
   public
   
    
   
   class
   
    Tran {
 
   
   static
   
    
   
   int
   
    avg(
   
   int
   
    number1,
   
   int
   
    number2) 
   
   throws
   
    MyException{
 
   
   if
   
   (number1
   
   <
   
   0
   
   ||
   
   number2
   
   <
   
   0
   
   ){
 
   
   throw
   
    
   
   new
   
    MyException(
   
   "
   
   不可以使用负数
   
   "
   
   );
 }
 
   
   if
   
   (number1
   
   >
   
   100
   
   ||
   
   number2
   
   >
   
   100
   
   ){
 
   
   throw
   
    
   
   new
   
    MyException(
   
   "
   
   数值太大了
   
   "
   
   );
 }
 
   
   return
   
    (number1
   
   +
   
   number2)
   
   /
   
   2
   
   ;
 }
 
   
   public
   
    
   
   static
   
    
   
   void
   
    main(String[] args){
 
   
   try
   
   {
 
   
   int
   
    result
   
   =
   
   avg(
   
   -
   
   3
   
   ,
   
   1
   
   );
 System.out.println(result);
 }
   
   catch
   
   (MyException e){
 System.out.println(e);
 }
 }
}