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- #Jar launcher vs native launcher code#
- #Jar launcher vs native launcher license#
- #Jar launcher vs native launcher windows#
It is not sufficient for the application developer to deliver a simple JAR file they must deliver an installable package suitable for the native platform. Many Java applications need to be installed on a native platform in a first-class way, rather than simply being placed on the class path or the module path.
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#Jar launcher vs native launcher license#
There will be no aggregation of individual license files. There will be no special support for legal files beyond what is already provided in JMOD files.The packaging tool will depend upon platform-specific tools.
#Jar launcher vs native launcher windows#
For example, in order to create Windows packages one must run the tool on Windows. There will be no support for cross compilation.There will be no GUI for the tool a command-line interface (CLI) is sufficient.jdeps usage for determining required modules, and.The following features of the javapackager tool will not be supported:.These formats include msi and exe on Windows, pkg and dmg on macOS, and deb and rpm on Linux.Īllows launch-time parameters to be specified at packaging time.Ĭan be invoked directly, from the command line, or programmatically, via the ToolProvider API. Supports native packaging formats to give end users a natural installation experience.
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GoalsĬreate a simple packaging tool, based on the JavaFX javapackager tool, that: Program will exit.Ĭ:\Users\Tim\Desktop>java -jar launcher.Create a tool for packaging self-contained Java applications. : launcher.jarĪt $1.run(Unknown Source)Īt (Native Method)Īt (Unknown Source)Īt (Unknown Source)Īt $AppClassLoader.loadClass(Unknown Source)Ĭould not find the main class: launcher.jar. Here is a reproduction of what I think you see:Įxception in thread "main" : launcher/jar Caused by: Update: After thinking about it a little more, based on the output above and comments below, my guess is that you are trying to run the jar using the 'java' command from the command line. While exporting from eclipse, an option is to select a run configuration (from a previous test run for instance) and eclipse uses that info to populate the manifest. Runnable JARs need a Manifest that indicates the main class to use. tProperty("", System.getProperty("user.dir") + "natives") ĬlassLoader = URLClassLoader.newInstance(new URL) ĬlassLoader.loadClass("2").newInstance() Program will exit" (this is on the console, I want to be able to double click the JAR and have it launch) File file = new File(System.getProperty("user.dir") + "/lessur.jar") I'm currently trying to replicate the functionality, however, when I export as a runnable JAR in Eclipse, when I try launch it, it prints "Could not find main class launcher.jar. The Minecraft launcher doesn't need any external Java libraries to run either. If it is not present on the system, it downloads it. Then, after logging in, the launcher then runs the main Minecraft core, minecraft.jar. When the launcher is started, it displays a login screen with news etc.
#Jar launcher vs native launcher code#
The user can download a JAR (Or a JAR packaged into an EXE), which has absolutely no code for the Minecraft client at all. If you have never played Minecraft, then this is how the mechanics of the launcher work.