Write a Regular expression that check whether a string contains an Vowel or not? You have also include the driver code in Java Language. Your driver code should take string from the user.

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Methods of StringBuilder class

The StringBuilder class can be used to create mutable strings. The methods defined in the StringBuilder class are widely used to manipulate and concatenate strings. It is a non-synchronized class which has public methods that can be accessed by multiple threads. It is not thread-safe.