How to run an executable JAR file with arguments?
Let’s see the basic syntax for running an executable JAR file with arguments: java -jar jar-file-name [args &] The executable JAR created earlier is a simple application that just prints out the arguments passed in. We can run it with any number of arguments.
What is the meaning of an argument in Java?
@Flex: An argument is an argument. The meaningof the argument is entirely up to the program being run. One program could interpret -hto be an option, another could interpret it as a filename. ProcessBuilderneither knows nor cares.
What does passing arguments do in processbuilder?
It allows passing arguments to the target program separated by spaces. The program waits for the execution of the batch file or the target program to complete. Reads the execution output buffer in a background thread to avoid any hang scenario.
How are arguments separated in Java command line?
Arguments are separated by one or more spaces. If an argument needs to contain spaces, the spaces have to be enclosed between quotes. Either single quotes or double quotes work fine. Usually, for a typical Java application, when invoking the application, the user enters command-line arguments after the name of the class.
Can a Java command line accept zero arguments?
Java Command Line Arguments Just like any application, a JAR application accepts any number of arguments, including zero arguments. It all depends on the application’s need. This allows the user to specify configuration information when the application is launched.
What kind of characters can be used in an argument in Java?
An argument can contain any alphanumeric characters, unicode characters and possibly some special characters allowed by the shell, for example ‘@’. Arguments are separated by one or more spaces. If an argument needs to contain spaces, the spaces have to be enclosed between quotes. Either single quotes or double quotes work fine.
What does non executable jar mean in Java?
A non-executable JAR is simply a JAR file that doesn’t have a Main-Class defined in the manifest file. As we’ll see later, we can still run a main class that’s contained in the JAR file itself. Here’s how we would create a non-executable JAR without a manifest file: 3. Java Command Line Arguments