Web Reference: Mar 24, 2026 · Command-line arguments in Java are space-separated values passed to the main (String [] args) method. JVM wraps them into the args [] array, where each value is stored as a string (e.g., args [0], args [1], etc.). The number of arguments can be checked using args.length. Command line arguments can be passed by multiple ways to Java application or program. Most commonly, command line arguments are passed from console where a java program is executed. command-line arguments, provided during program execution, are captured in the main () method as a string array. It’s quite common to run applications from the command-line using arguments. Especially on the server-side. Usually, we don’t want the application to do the same thing on every run: we want to configure its behavior some way. In this short tutorial, we’ll explore how can we handle command-line arguments in Java.
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