The use of several printouts and stringtokenizer about Exception in Java

Today do SSD 3 Quiz 1, try to throw out the effect of the exception (see Icarnegieinfoapplication.java):
Nfe.printstacktrace ()/write a large paragraph
System.out.println (Nfe.getmessage ()); The output result is just "for input string" AA "
System.out.println (Nfe.getcause ()); Output "NULL"
System.out.println (Nfe.getlocalizedmessage ()); The same as. GetMessage
Stderr.println (Nfe.getmessage ());/the same as. GetMessage


Then there is the use of StringTokenizer. Start Vivizhyy only by the impression of writing parameters, the number of the results are not correct.
The beginning is written stringtokenizer StringTokenizer = new StringTokenizer (":");
This will still have the ":" In the results, after checking the API, plus the need to be divided into strings as the first argument, so. That ":" will be divided. (Refer to Secondscalculator)

Ps.
StringTokenizer (String str)
Constructs a string tokenizer for the specified string.
StringTokenizer (String str,string Delim)
Constructs a string tokenizer for the specified string.
StringTokenizer (String str,string Delim, Boolean returndelims)
Constructs a string tokenizer for the specified string.
The third use of VIVIZHYY has not been played yet.

And there is a way to stringtokenizer this class: Counttokens () calculates the number of times so this tokenizer ' s nexttoken methods can be C Alled before it generates an exception.

Well, I have finished quiz, so happy.