Can't Run JAR Files

开发者_JAVA百科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.

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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.

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

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You should download a Java runtime environment.

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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.

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

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

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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.