带有不明确参数的Java继承概念

public class ParentClass {
    public void printMessage(String message) {
        System.out.println("Parent: " + message);
    }
}

public class ChildClass extends ParentClass {
    public void printMessage(int number) {
        System.out.println("Child: " + number);
    }
}

public abstract class AbstractClass {
    public abstract void printMessage(Object obj);
}

public class ConcreteClass extends AbstractClass {
    public void printMessage(Object obj) {
        if (obj instanceof String) {
            System.out.println("String: " + obj);
        } else if (obj instanceof Integer) {
            System.out.println("Integer: " + obj);
        }
    }
}

public class GenericClass<T> {
    public void printMessage(T obj) {
        System.out.println(obj);
    }
}

public class ChildClass extends GenericClass<String> {
    // 子类指定了参数类型为String
}