Introduction When developing database applications, one of the common requirements is to get the auto generated key back from the database after an insert statement has been executed. Different database vendors offer specific commands that can be used to retrieve auto generated keys, for example in MySQL, executing the following would obtain the last inserted key value. SELECT LAST_INSERT_ID(); Using a GeneratedKeyHolder Spring’s JdbcTemplate uses a GeneratedKeyHolder class to return the last inserted generated key when executing update commands via PreparedStatements.

SDKMAN! allows us to easily install and use different JDKs. It can become frustrating to have to change JDK versions manually for different projects. Fortunately, SDKMAN! has a solution to this in the form of the sdk env command. This command allows us to define a different JDK per project which can be easily switched to, without having to remember the JDK version. Additionally, it can be configured to automatically change to the required JDK when changing directories.

SDKMAN! describes itself as: a tool for managing parallel versions of multiple Software Development Kits on most Unix based systems. It provides a convenient Command Line Interface (CLI) and API for installing, switching, removing and listing Candidates. What this means, is that it is a powerful tool that allows you to easily change between different versions of the JDK without having to modify JAVA_HOME or other environment variables.