The JdtSetRuntime command isn't available.

[lobophf]

I have been using nvim-jdtls for months, and now I need to use an old Java version. To change the runtime environment to Java 11, I just put the path to these versions on my config file. See this snippet.

settings = {
  ...
  java = {
    eclipse = {
      downloadSources = true,
    },
    configuration = {
      updateBuildConfiguration = "interactive",
      runtimes = {
        {
           name = "JavaSE-17",
           path = "/usr/lib/jvm/java-17-openjdk-amd64/"
        },
        {
           name = "JavaSE-11",
           path = "/usr/lib/jvm/java-11-openjdk-amd64/"
        },
      }
    }
  },
  ...
}

Additionally, I tried without success to change the Java version by using the JdtSetRuntime command I saw here. However, for some reason, this command isn't available for me. The nvim suggests only the JdtShowLogs and JdtWipeDataAndRestart commands.

My complete config is available here.

[lobophf]

The following command is exactly what I was looking for and it solves the problem.

:lua require('jdtls').set_runtime('JavaSE-11') 

Note: To enable the :JdtUpdateConfig command I had to add the command below in my ftplugin/java.lua file.

vim.cmd "command! -buffer -nargs=? -complete=custom,v:lua.require'jdtls'._complete_set_runtime JdtSetRuntime lua require('jdtls').set_runtime(<f-args>)"