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I have a jar which contain two main class Class A and Class B. In the manifest i have mentioned Class A . Now i have to execute classB from the same jar . what should be the command.
I dont prefer to make two separate jars.
Thanks
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To run an application in a nonexecutable JAR file, we have to use -cp option instead of -jar. We'll use the -cp option (short for classpath) to specify the JAR file that contains the class file we want to execute: java -cp jar-file-name main-class-name [args …]
Type 'javac MyFirstJavaProgram. java' and press enter to compile your code. If there are no errors in your code, the command prompt will take you to the next line (Assumption: The path variable is set). Now, type ' java MyFirstJavaProgram ' to run your program.
Running Jar file require you to have the jar file included in your class path. This can be done at run time using URLClassLoader . Simply construct a URLClassLoader with the jar as one of the URL. Then call its forClass(...) if you know the class name (full name of course).
This will do the job: java -classpath yourjar.jar youpackage.B
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