我應該如何將這些類分離到包/庫中？

Question

當你有下面這三種類型的 class 時，我應該如何將這些類分成 jar/庫？

//#1. A client program which uses Concrete class objects.
public class ClientProgram {
    AbstractBase objA = new ConcreteA();
    AbstractBase objB = new ConcreteA();
    ....
}

//#2. A base abstract class for concrete classes
public abstract class AbstractBase {
     ....
}

//#3. Concrete classes
public class ConcreteA extends AbstractBase {
     ....
}
public class ConcreteB extends AbstractBase {
     ....
}

Answer 1

Here is a detailed documentation describing creating jars: https://docs.oracle.com/javase/tutorial/deployment/jar/build.html