JDK (Java Development Kit)¶

Install¶

Install Java using SDKMAN with the following command:

sdk install java 21.0.2-tem

Usage¶

Version listing¶

To list all available Java versions, use:

sdk list java

To list all installed and local Java versions, use:

sdk list java | awk 'NR<=5 || tolower($0) ~ /installed|local only/'

Info

The above command lists the first 5 lines of the output from sdk list java and then filters the remaining lines to show only those that contain "installed" or "local only", ignoring case. This way, you can see the available versions as well as the ones you have installed or are available locally.

Version switching¶

To use a specific Java version, use:

sdk use java 21.0.2-tem

To set a specific Java version as the default, use:

sdk default java 21.0.2-tem

Configuration¶

Certificates¶

To list the certificates in the keystore, use the following command:

keytool -list -keystore [keystore] -storepass [storepass]

To add a certificate to the keystore, use the following command:

keytool -import -alias [alias] -keystore [keystore] \ 
        -storepass [storepass] -file [certificate]