cs-java

Display Java version by using coursier

$ cs java -version

$ cs java --jvm [jvm_name]:[jvm_version] -Xmx32m -X[another_jvm_opt] -jar [path/to/jar_name.jar]

$ cs java --available

$ cs java --installed

$ cs java --jvm [jvm_name]:[jvm_version] --env

$ eval "$(cs java --disable)"

$ cs java --jvm [jvm_name]:[jvm_version] --setup

cs-java [options] [arguments]

--compile
    Compiles Java source files in the current project.

--run
    Executes the main class of the compiled Java application. May require a main class argument.

--test
    Runs predefined unit or integration tests (e.g., JUnit tests).

--clean
    Removes compiled .class files and other build artifacts.

--jar filename
    Packages the compiled application into a JAR file with the specified name.

--help
    Displays usage information and available options for cs-java.

--version
    Shows the version of the cs-java script or the underlying Java version.

The command cs-java is not a standard Linux utility found in typical distributions. It is highly probable that cs-java is a custom script or an alias specifically created within a Computer Science (CS) or academic environment, such as a university or college department.

Its purpose would be to simplify common Java development workflows for students or researchers. Instead of typing lengthy javac, java, or jar commands with specific class paths or options, cs-java acts as a convenient wrapper. It might automate tasks like:
   • Compiling Java source code (e.g., all .java files in a directory).
   • Running compiled Java applications.
   • Executing automated tests (e.g., JUnit).
   • Cleaning build artifacts (e.g., .class files).
   • Packaging applications into JAR files.
   • Managing project dependencies (though less likely to be a full-fledged build system like Maven or Gradle).

The exact functionality of cs-java would be entirely dependent on its implementation within the specific environment where it is found.

The primary caveat is that cs-java is not a standard, universally available command. Its presence, behavior, and options are entirely specific to the environment in which it was created.

   • Portability: Code relying on cs-java will not be portable to other Linux systems without replicating the script.
   • Undocumented behavior: Its functionality might not be officially documented outside the specific institution. Users may need to inspect the script's source code or ask local administrators.
   • Security implications: As it's a custom script, its source should be trusted if it executes with elevated permissions or handles sensitive data.

To understand the exact functionality of cs-java on a specific system, you can use the following methods:
   • Check its type: Use type cs-java to see if it's an alias, function, or an executable.
   • Locate the script: If it's an executable, use which cs-java to find its path, then inspect the script file (e.g., cat $(which cs-java) or less $(which cs-java)).
   • Look for documentation: Check local course materials, system documentation, or ask system administrators or instructors.

Given that cs-java is a custom command, it does not have a public, documented history like standard Linux utilities. It likely emerged from a need within academic computer science departments to provide a simplified and consistent interface for students to compile, run, and manage Java projects, especially in environments where full-fledged build systems like Maven or Gradle might be considered too complex for introductory courses.

Its development would typically be internal to the institution, evolving as teaching methodologies or underlying Java versions change.

javac(1), java(1), jar(1), mvn(1), gradle(1)