Executing a jar file

[peiceonly]

Hi all
How can I execute a jar file ?
how can I make such file ?
Will it be executed as an exe file in windows ?

[goldhouse]

Sun defines the jar files as below
JAR file is a file format based on the popular ZIP file format and is used for aggregating many files into one. A JAR file is essentially a zip file that contains an optional META-INF directory. A JAR file can be created by the command-line jar tool, or by using the java.util.jar API in the Java platform. There is no restriction on the name of a JAR file, it can be any legal file name on a particular platform.

In many cases, JAR files are not just simple archives of java classes files and/or resources. They are used as building blocks for applications and extensions. The META-INF directory, if it exists, is used to store package and extension configuration data, including security, versioning, extension and services.

The main attributes for the Manifest file include Main-Class : where you can specify the entry class for the jar file.
But still this is not like exe because it is just the zipped classes and it is platform independent.

[levent]

Quote:

The main attributes for the Manifest file include Main-Class : where you can specify the entry class for the jar file.
But still this is not like exe because it is just the zipped classes and it is platform independent.

Normally, when you installed a JRE on a machine, it adds a filetype "jar" associated with java.exe. With that association, when you double click on a jar file, it is run by JRE. (If Main-Class attribute set correctly as goldhouse stated.)