Similar to what Richard Detsch but with a bit easier to follow (works with packages as well) Step 1: Unwrap the War file. jar -xvf MyWar.war Step 2: move into the directory cd WEB-INF Step 3: Run your main with all dependendecies java -classpath “lib/*:classes/.” my.packages.destination.FileToRun
2020 Update: The maven dependency plugin should be used whit the dependency:sources goal: <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-dependency-plugin</artifactId> <version>3.1.1</version> <executions> <execution> <id>download-sources</id> <goals> <goal>sources</goal> </goals> <configuration> </configuration> </execution> </executions> </plugin> This can also be run from the command line as: mvn dependency:sources -Dsilent=true Executing mvn dependency:sources will force maven to download all sources of all jars in … Read more
If you have previously used the right click and opened with \path\to\your\javaw.exe then you will need to remove the following registry key. [-HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.jar] Then run C:\>assoc .jar=jarfile C:\>ftype jarfile=”C:\path\to\your\javaw.exe” -jar “%1” %*
maven-jar-plugin: This plugin provides the capability to build and sign JARs. But it just compiles the java files under src/main/java and src/main/resources/. It doesn’t include the dependencies JAR files. maven-assembly-plugin: This plugin extracts all dependency JARs into raw classes and groups them together. It can also be used to build an executable JAR by specifying … Read more
This happens when you somehow confused java itself. You are trying to run a java 6 VM where it found a JRE 7. It might show this problem even if you type in the command line just java or java -version in a misconfigured environment. The JAR is not the problem, except in the very … Read more
The runnable jar contains a MANIFEST.MF file, which defines the Main class to be executed when the jar is run. Non-runnable jars are just libraries of classes, that can be added to the classpath so that code is reused (it also contains the manifest file, but no main class there)
A jar file is simply a file containing a collection of java files. To make a jar file executable, you need to specify where the main Class is in the jar file. Example code would be as follows. public class JarExample { public static void main(String[] args) { javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { … Read more
The AAR file consists of a JAR file and some resource files (it is basically a standard zip file with a custom file extension). Here are the steps to convert: Extract the AAR file using standard zip extract (rename it to *.zip to make it easier) Find the classes.jar file in the extracted files Rename … Read more
A JAR file is actually just a ZIP file. It can contain anything – usually it contains compiled Java code (*.class), but sometimes also Java sourcecode (*.java). However, Java can be decompiled – in case the developer obfuscated his code you won’t get any useful class/function/variable names though.