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Need Regular Expression

 
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Hi,

In my code i have a string.
Now in this string i need to print a warning message, if contains
any character other than (A-Z,a-z,0-9,_)

I tried to do with contains([A-Za-z0-9_])and pattern().
But could not get through.

Where am i doing mistake. Can you please point it out..

Tahnks,
Kaya.
 
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Check the API of java.util.regex.Pattern. It clearly specifies how to create an "Any character except" character class.
 
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