One way to get the JRuby version at runtime is by using the JRUBY_VERSION constant. This constant contains the version number of the JRuby runtime that is currently being used. You can access this constant in your code to retrieve the version number of the JRuby runtime at any point during program execution. This can be useful for debugging, logging, or any other scenario where knowing the version of JRuby being used is necessary.
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How to retrieve the jruby version in a CircleCI build?
You can retrieve the jruby version in a CircleCI build by running the following command in your CircleCI configuration file:
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- run: jruby -v
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This will output the version of the jruby installed on the CircleCI build machine. You can also specify the version if you want to check for a specific version of jruby:
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- run: jruby -v 9.2.11.1
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This will output the specific version of jruby installed on the CircleCI build machine.
How to display the jruby version in a C# application?
To display the jruby version in a C# application, you can use the following code to execute a command that displays the jruby version using the command prompt:
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// Create a new instance of the Process class Process process = new Process(); // Set the StartInfo properties process.StartInfo.FileName = "cmd.exe"; process.StartInfo.Arguments = "/C jruby -v"; process.StartInfo.RedirectStandardOutput = true; process.StartInfo.UseShellExecute = false; process.StartInfo.CreateNoWindow = true; // Start the process process.Start(); // Read the output of the command string output = process.StandardOutput.ReadToEnd(); // Display the jruby version Console.WriteLine(output); // Close the process process.Close(); |
This code will open a command prompt and execute the jruby -v command to display the jruby version. The output of the command will be captured and displayed in the C# application.
How to determine the jruby version in a Java program?
You can determine the JRuby version in a Java program by using the following code snippet:
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import org.jruby.RubyInstanceConfig; import org.jruby.runtime.Constants; public class JRubyVersion { public static void main(String[] args) { RubyInstanceConfig config = new RubyInstanceConfig(); String jrubyVersion = Constants.JRUBY_VERSION; System.out.println("JRuby version: " + jrubyVersion); } } |
This code snippet creates a RubyInstanceConfig object and retrieves the JRuby version using the Constants.JRUBY_VERSION constant. It then prints out the JRuby version to the console.
How to access the jruby version in a Powershell script?
To access the jruby version in a Powershell script, you can use the following command:
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jruby --version
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This command will display the version of jruby that is currently installed on your system. You can use this command in a Powershell script by simply including it in a script file and running the script in your Powershell console.
You can also store the output of the command in a variable and use it in your script, like this:
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$jrubyVersion = jruby --version Write-Output "The installed jruby version is $jrubyVersion" |
This script will display the jruby version in the Powershell console when executed.
How to print the jruby version in a Scala application?
To print the JRuby version in a Scala application, you can use the following code snippet:
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import org.jruby.util.JRubyVersion object Main { def main(args: Array[String]): Unit = { val jrubyVersion = JRubyVersion.JRUBY_VERSION println(s"JRuby version: $jrubyVersion") } } |
This code imports the JRubyVersion class from the org.jruby.util package and retrieves the JRuby version using the JRUBY_VERSION constant. It then prints the JRuby version to the console.
