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How Can I Execute a JAR File with External Dependencies?

Linda Hamilton
Release: 2024-12-13 14:29:13
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How Can I Execute a JAR File with External Dependencies?

Executing JAR Files with Custom Classpath

Due to limitations with the "-jar" option, specifying "-cp" will have no effect. As per the Java documentation, using "-jar" makes the JAR file the sole source of user classes, overriding other classpath settings.

Additionally, JAR files cannot encompass other JAR files. To include necessary dependencies, you can either:

  • Include the JAR files from the "lib" directory in the manifest using relative paths.
  • Specify all JAR files on the command line using "-cp":
java -cp MyJar.jar:lib/* com.somepackage.subpackage.Main
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This command will execute the main class from the specified JAR while loading dependencies from the "lib" directory.

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