java:tldr:04439

The command "java -jar ${filename-jar}" is used to run a Java program packaged in a JAR (Java Archive) file. Here's a breakdown of the command:

• "java" is the command that launches the Java Virtual Machine (JVM), the runtime environment for running Java applications.
• "-jar" is an option that specifies that the following argument is a JAR file.
• "${filename-jar}" is a placeholder for the actual filename of the JAR file. It is often used in shell scripts or command-line environments, and you should replace it with the actual filename you want to run.

To use this command, you would replace "${filename-jar}" with the name of your JAR file (excluding the {} braces). For example, if your JAR file is named "myProgram.jar", the command would be:

java -jar myProgram.jar

By running this command, the JVM will start and execute the main method of the Java program contained within the JAR file, initiating the program's execution.