How to parse CSV file in Java and display all the value.The solution treats the case when a column contains the delimiter and the double quote character.

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Split URL into components (protocol, domain, port and uri) using regex in Java. Simple and tested example.

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How to format XMLGregorianCalendar object output using SimpleDateFormat class in Java. Simple tested example.

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How to get current date and time in a specific format using Date, Calendar and SimpleDateFormat class.

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How to read and write JSON with json-simple library. Full example how to create an object, write it to a file, read it and use it.

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Luhn algorithm implementation in Java with example for both calculate the check digit and validate the number.

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