Can't Run JAR Files

Question

I can run my project through netbeans but after I make a jar file and double click it I get the error cannot find Java runtime environment? I am on Windows.

Answer 1

Make sure you have JRE installed. Open the console and type java -version

Answer 2

You should download a Java runtime environment.

Answer 3

You don't have a file associate created. Right click on the .jar file in Internet Explorer, select Open With, and navigate to your JRE. Select the java.exe executable, and make sure the command-line argument has ' -jar ' present.

The .jar file will be passed as the first argument to the JVM.

Answer 4

Make sure the JRE bin dir is in your PATH env variable.

Answer 5

You might try, as Chris said, making sure the JRE executable is part of your PATH environment variable. Check out "4. Update the PATH variable (Optional)" from this guide.

Answer 6

It's all about the Manifest - http://java.sun.com/docs/books/tutorial/deployment/jar/manifestindex.html

Answer 7

In Netbeans run the project. It will ask you what class to run (you will see a list of all the classes with a "public static void main(String[])" method). Once you do that the next time you build the class netbeans will show you how to run it (with the -jar witch). Now you should be able to double click on it.