How to Generate a Random String in Java

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How to Generate a Random String in Java

Generating random strings is a common requirement in many Java applications, such as creating unique identifiers for sessions, tokens, passwords, and more. This guide explores multiple ways to generate a random string in Java, showcasing various approaches to meet different use cases.

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This method builds a random string of the specified length by selecting random characters from a predefined set of uppercase letters, lowercase letters, and digits.

Here’s how to generate a random string using SecureRandom:

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Here is an example:

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This method generates a UUID and converts it to a string. We can remove hyphens if needed for a cleaner format.

Conclusion

Experiment with these approaches and choose the one that fits your needs best!