Как открыть jar файл с помощью java windows 7

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An interesting side effect of this causes a problem when starting runnable jar files in the command prompt.

If you try (in a command prompt):

jarfile.jar parameter

No joy, because this is being translated to the following (which doesn’t work):

javaw.exe -jar jarfile.jar parameter

However, the following command does work:

java.exe -jar jarfile.jar parameter

If you change the association in file manager as described above to:

"C:Program FilesJavaj2re1.4.2_04binjava.exe" -jar "%1" %*

Then you can type:

jarfile.jar parameter

in the command prompt and it will now work!

EDIT:(However you then get a black console window when you run a form based (non console) Java app, so this is not an ideal solution)

If you run these jar files by double clicking them in windows, no parameters will be passed so your Java code needs to handle the stack overflow exception and include a «press a key» function at the end or the window will just disappear.

In order to pass a parameter in windows you have to create a shortcut to the jar file, which includes the parameter in the target line (right click on the shortcut and select properties) you can not add parameters to the jar file icon itself in this way.

There isn’t a single, consistent solution here, but you would have the same problem with any other console application.

There is a windows freeware application called «bat to exe» which you can use to create an exe file from a .bat file with the apropriate command line in it. you can also embed the jar file in the exe with this application, and make it clean it up when it has finished running, so this may be a more elegant solution.

An interesting side effect of this causes a problem when starting runnable jar files in the command prompt.

If you try (in a command prompt):

jarfile.jar parameter

No joy, because this is being translated to the following (which doesn’t work):

javaw.exe -jar jarfile.jar parameter

However, the following command does work:

java.exe -jar jarfile.jar parameter

If you change the association in file manager as described above to:

"C:Program FilesJavaj2re1.4.2_04binjava.exe" -jar "%1" %*

Then you can type:

jarfile.jar parameter

in the command prompt and it will now work!

EDIT:(However you then get a black console window when you run a form based (non console) Java app, so this is not an ideal solution)

If you run these jar files by double clicking them in windows, no parameters will be passed so your Java code needs to handle the stack overflow exception and include a «press a key» function at the end or the window will just disappear.

In order to pass a parameter in windows you have to create a shortcut to the jar file, which includes the parameter in the target line (right click on the shortcut and select properties) you can not add parameters to the jar file icon itself in this way.

There isn’t a single, consistent solution here, but you would have the same problem with any other console application.

There is a windows freeware application called «bat to exe» which you can use to create an exe file from a .bat file with the apropriate command line in it. you can also embed the jar file in the exe with this application, and make it clean it up when it has finished running, so this may be a more elegant solution.

• Follow this answer, if you’ve got a jar file, and you need to run it
• See troubleshooting sections for hints to solve most common errors

Introduction

There are several ways to run java application:

1. java -jar myjar.jar — is the default option to run application
2. java -cp my-class-path my-main-class or java -classpath my-class-path my-main-class
3. java --module-path my-module-path --module my-module/my-main-class
4. Deployment to an enterprise server. It’s when you have war or ear file. We’ll omit the explanation for this
   case

In this answer I’ll explain, how to run a jar if you have to run it manually, give hints to resolve common problems.

java -jar

Start with the most common option: run the jar file using the -jar. Example:

java -jar myjar.jar

If it fails:

• with no main manifest attribute, then the jar is not executable:
  • If you’re trying to build a jar
    see Can’t execute jar- file: «no main manifest attribute»
  • Otherwise, proceed with classpath or module-path solution below
• with other error, then see «Troubleshooting» section below

Classpath or module path

If -jar failed, then the jar should be run using classpath or module-path.

Module-path is used, when an application is modular itself.
JPMS — Java Platform Module System — is a modern way to develop, distribute and run applications. For details:

1. Watch excellent Modular Development with JDK 9 by Alex Buckley
2. See awesome-java-module-system

To run a jar:

1. Determine if it’s modular or not:
   1. Invoke:

      jar --describe-module --file=path-to-jar-file
      

2. Examine output:
   1. If you see No module descriptor found. in the first line, then proceed with classpath solution below
   2. If you see something similar to:

   org.diligentsnail.consoleconsumer@1.0-SNAPSHOT jar:file:///home/caco3/IdeaProjects/maven-multi-module-project-demo/jars/console-consumer.jar!/module-info.class
   requires java.base mandated
   requires org.diligensnail.hellolibrary
   

   continue with module-path solution below

See also: List modules in jar file

Classpath

Try the following:

java -cp my-jar.jar my-main-class

• -cp is the same as -classpath
• my-jar.jar is the jar to run
• my-main-class is name of the class with static void main(String[]) method

Example:

java -cp jars/console-consumer.jar org.diligentsnail.consoleconsumer.Main

Module-path

Try the following command:

java --module-path my-jar.jar --module my-module-name/my-main-class

• my-jar.jar is the jar to run
• my-module-name is name of the module where my-main-class belongs
  • Usually my-module-name is in the module-info.java file
• my-main-class — the class with the static void main(String[]) method

If it fails with FindException:

• Example of message:

  Error occurred during initialization of boot layer
  java.lang.module.FindException: Module javafx.fxml not found, required by org.diligentsnail.javafxconsumer
  

• Usually, this means the my-jar.jar has a dependency on the other jar.
  For example, the application uses a third party library.
  See «Supplying dependencies» below

Troubleshooting

UnsupportedClassVersionError

Update java. See List of Java class file format major version numbers?

NoClassDefFoundError, NoSuchMethodError, NoSuchFieldError

See:

1. «Supplying dependencies» section
2. Why am I getting a NoClassDefFoundError in Java?

Supplying dependencies

An Error or Exception is thrown when an application run with missing or out of date dependencies.
Common exceptions and errors:

1. NoClassDefFoundError, NoSuchFieldError, NoSuchMethodError
2. ClassNotFoundException, NoSuchFieldException, NoSuchMethodException
3. FindException

To supply dependencies:

1. Determine the list of dependencies
   1. Usually it’s a list of jar or can be a list of directories or both
2. Join the list with : if you’re running Unix, ; — if you’re on Windows
3. Invoke java with -classpath or --module-path

Example

• Project maven-multimodule-project-demo
• I’m trying to run console-consumer.jar:
  • Command:

    java -classpath jars/console-consumer.jar org.diligentsnail.consoleconsumer.Main
    

  • jars/console-consumer.jar is the jar I’m trying to run
  • org.diligentsnail.consoleconsumer.Main is the class with main method
• Error I get:

  Exception in thread "main" java.lang.NoClassDefFoundError: org/diligentsnail/hellolibrary/Hello
    at org.diligentsnail.consoleconsumer.Main.main(Main.java:11)
  Caused by: java.lang.ClassNotFoundException: org.diligentsnail.hellolibrary.Hello
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
    ... 1 more
  

• Missing dependency is jars/hello-library.jar
• Correct command:

  java -classpath jars/console-consumer.jar:jars/hello-library.jar org.diligentsnail.consoleconsumer.Main