How to Compile Java Source Code into a Native Executable (EXE)

How can I compile Java source code into a native executable (EXE)?

Compiling Java source code into a native executable format (EXE) can enhance distribution by allowing users to run applications without requiring a Java Runtime Environment (JRE). There are several tools and methods available to achieve this, catering to different project requirements and complexities.

// Example of creating a simple EXE using Launch4j
// Step 1: Generate the JAR file using 'javac' and 'jar' commands.
// Step 2: Use Launch4j to wrap the JAR into an EXE.
// Launch4j configuration example (launch4j-config.xml):
<launch4jConfig>
  <output>myapp.exe</output>
  <jar>myapp.jar</jar>
  <minVersion>1.8.0</minVersion>
  <jre>
    <path>path/to/jre</path>
  </jre>
</launch4jConfig>

Causes

• Applications requiring native execution to simplify user experience
• Need for enhanced performance and startup speed
• Distribution of Java applications to users not familiar with Java setup

Solutions

• Using tools like Launch4j to wrap JAR files into EXE format.
• Utilizing GraalVM's native-image feature to compile Java applications into native binaries directly.
• Employing a build automation tool like Maven or Gradle with plugins for executable creation.

Mistake: Ignoring JRE requirements when distributing EXE.

Solution: Ensure that the necessary JRE version is included or specify the JRE path in the EXE settings.

Mistake: Not testing the executable in an environment without Java installed.

Solution: Test the EXE on a clean system to confirm it runs without Java dependencies.