execute a main class from a jar

Question

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

Answer 1

这将完成这项工作： java -classpath yourjar.jar youpackage.B

Answer 2

Why don't you create a Main class that accepts an argument? That argument will decide whether to execute Class A or Class B then.

Answer 3

使用命令行开关来识别是应该执行A类还是B类。