Question: create a java program that ask user to input their user name 1. it can't contain any special character (ex.!@#$%....) 2. It's can't contain any

create a java program that ask user to input their user name

1. it can't contain any special character (ex.!@#$%....)

2. It's can't contain any space(ex.my id)

3. 1

4. If there is error , it have to print the reason why

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