Question

i want to know how to make a jar app which will run on java mobile platform using class file of java.
i know basics of java like inheritance,interface,string…..I tried this thing by compiling my java program of simple input/output and then converting it to jar using -jar in cmd.but i dont know why it is not working on mobile showing invalid file.
plz help me.

Answer 1

If you want to create a jar application, starting from a java class,you don’t have to use java -jar filename.jar, this is only for execution.

Try this: jar cf your_jar_app.jar your_class_file.class

c option is needed to create file and f option is needed because you want an output file.

Then you can execute typing: java -jar your_jar_app.jar

Hope this can help you.

For documentation: Oracle Documentation for creating JAR file
If you are using NetBeans IDE, take a look to: NetBeans Packaging and Deploying Java Applications