However, with licensing costs in the thousands of dollars, it has always been a niche option. On Mac OS X, JOAs menu bar is at the top of the screen in adherence to.An ahead-of-time (AOT) Java compiler, providing a more-or-less C++ style experience. Excelsior JET isStart the Java OceanAtlas application (e.g., by double-clicking on its icon). I realize that it is too much to hope for to expect reporters to stick with the facts and explain what has really happened - so that is why it falls to us non-reporters.There have been solutions from nearly the beginning.
![]() ![]() ![]() Meaning that unlike javapackager, which bundles the entire standard library, jlink bundles a stripped-down JRE with only those modules that your application needs. Bash script or Windows batch file) for launching your application with theHowever, jlink establishes “link time” as a new optional phase, in between compile-time and run-time, for performing optimizations such as removing unreachable code. an embedded Java Runtime Environment, and your application code and dependencies, Moreover, because of the way that JavaFX works, the low-level library needs access to our code. For both, notice that the build.gradle file configures each project for Java 9 compatibility with this line:This, along with creating a module-info.java file, sets up each project for modularization.Our CLI application is just a glorified System.out.println() call, so it depends only on the java.base module (which is always implicit, and needs no declaration).Not all applications use JavaFX, however, so our GUI app must declare its dependency on the javafx.graphics and javafx.controls modules. The cli subdirectory is a “Hello World” command-line application, while gui is a JavaFX desktop app. To illustrate, let’s look at a sample project:This repo contains a multi-project Gradle build. If your project has third-party library dependencies, then you’ll want to use your choice of “shaded” or “fat-JAR” plugins to generate a single JAR with all dependencies included.In this case, our examples use only the standard library. (2) Build an executable JARTo build a deployable bundle with jlink, you first want to package up your application into an executable JAR file. I assume that if Eclipse and NetBeans don’t have similar support already, then they soon will. However, once a project is setup for modularization, IntelliJ is great at recognizing missing declarations and helping auto-complete them. The JDK includes a jdeps tool that can help with this. Reverse engineering tool for macThe -module-path flag is analogous to the traditional CLASSPATH. It should be easy to follow, such that you can tell the command-line invocation would look like this:/bin/jlink -module-path libs:/jmods -add-modules cli -launcher cli=cli/cli.Main -output dist -strip-debug -compress 2 -no-header-files -no-man-pages So my build scripts use an Exec task to run the tool in a completely separate process. The resulting bundle will include a /bin subdirectory, with a bash script or Windows batch file for executing your application. We only need to declare our own project modules ( cli or gui), because the modules that it depends on will be pulled in as transitive dependencies. The -add-modules flag declares which modules to add to the resulting bundle. Here, we tell it to look in the project’s libs subdirectory (because that’s where Gradle puts our executable JAR),And in the JDK directory for the standard library modules. JAR files, or the new JMOD format). Here, we are using a target directory named dist. The -output flag, intuitively enough, specifies a subdirectory in which to place the resulting bundle. Above, we are saying to create a script named bin/cli, which will invoke the class cli.Main in module cli. Ship Java Program Full JRE OnHugo, the website generator used to publish this blog, is a 27.2 megabyte Go executable. A “Hello World” CLI written in Go compiles to around 2 MB. For comparison, the full JRE on this platform is 203 megabytes. Mac terminal emulator exhaustAlso, the JRE is comparatively sluggish at startup, as its JIT compiler warms up.Even so, Java is now at a place where you can ship self-contained, zero-dependency applications that are comparable in size to other compiled languages (and superior to web-hybrid options like Electron). EXE“, and having a single monolithic file. The Electron quick-start example produces a 131 MB deliverable.To be fair, an application bundle with a launch script is not quite as clean as “ just building an. Plus any other shared libs, for functionality that Java provides in its base standard library. For cross-platform desktop GUI apps, I would argue that JavaFX combined with Java 9 modularization is hands-down the best choice available today. Docker, Kubernetes, Consul, Vault, etc)… Java is becoming a strong alternative, especially for shops with established Java experience. While only available for 64-bit Linux initially, this jaotcTool will hopefully soon expand to other platforms.Although Go has been very high-profile in the early wave of cloud infrastructure CLI tools (e.g.
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