从 Class 中获取将动态创建的值

Question

我正在尝试从另一个 class 中的 class 获取值，这将动态创建，也将动态创建方法。查看我已经完成的这些示例。

InterfaceA.java

public interface InterfaceA{
    public ArrayList<?> getValues();
}

ClassA.java / ClassB.java(consider another same class have value="World")

public Class A implements InterfaceA{
    String value = "Hello";

    public ArrayList<?> getValues(){
        ArrayList<String> values = new ArrayList<String>();
        values.add(this.value);
        return values ;
    }
}

ClassC.java

public Class C{
    public void getValues(){
        Object modelObject;
        Method getValues;
        modelObject = resolveClass("A"); // arg = classPath
        getValues= modelObject.getClass().getMethod("getValues");
        getValues.invoke(modelObject);
        ArrayList<?> classValues;

        // How to access Class A values from here
        // I want to do These Lines
        // classValue = get value from A/B.getValues() dynamically
    }

    private Object resolveClass(String className) throws
    ClassNotFoundException, NoSuchMethodException, SecurityException, 
    InstantiationException, IllegalAccessException, IllegalArgumentException,
    InvocationTargetException {
        Class<?> loadClass = Class.forName(className);
        Constructor<?> constructor = loadClass.getConstructor(String.class);
        Object object = constructor.newInstance(new Object[] {});

        return object;
    }
}

如何访问该方法返回的值如评论中提到的 ArrayList<>？

Answer 1

伪代码...

Method m = .. getMethod("getValues");
Object o = m.invoke(modelObject);
ArrayList<?> classValues = (ArrayList<?>) o

您可以找到更多信息here

从 Class 中获取将动态创建的值

Get values from Class that will be created dynamically

java

reflection

factory-pattern

java-ee-6