AVOID "throw e" !!!

There three kind of catch ... throw method:

catch(Exception e)
            }

The last two method are the same, while the first is different.

The first method will swallow down the exception's StackTrace

Example:

 1class Class1
 2    }

the result is:

at ConsoleApplication1.Class1.throwE()
at ConsoleApplication1.Class1.fun()
at ConsoleApplication1.Class1.Main(String[] args)

if we change the fun() to :

 

 1        void fun()
 2        }

the result is:

at ConsoleApplication1.Class1.fun()
at ConsoleApplication1.Class1.Main(String[] args)

we lose the true throw exception trace, so avoid "throw e"