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{{exception}} is used to improve program readability and reliability by detecting exceptional situation and possibly recover from it. However, it should not be used abusively to act as part of routine functionality. Irregular usage of exception will interrupt normal execution flow and degrade system performance\[[Effective Jave, item 39|http://books.google.com/books?id=ZZOiqZQIbRMC&pg=PA169&lpg=PA169&dq=item+39+use+exceptions&source=bl&ots=UZP26ufK15&sig=E60s65pIGPpYY7O79U96dx_oAqg&hl=en&ei=QLHzSsPFMMOZlAe3ioSiAw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CAgQ6AEwAA#v=onepage&q=item%2039%20use%20exceptions&f=false]\]. |
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