How to use reflection to instantiate Java. Net using generics util. ArrayList

How to use reflection to instantiate Java. Net using generic classes util. ArrayList？ I'm writing a program that sets Java. Net on the target object util. List method The runtime knows the list of target objects and common types:

public static void initializeList(Object targetObject,PropertyDescriptor prop,String gtype) {
    try {
        Class clazz = Class.forName("java.util.ArrayList<"+gtype+">");
        Object newInstance = clazz.newInstance();
        prop.getWriteMethod().invoke(targetObject,newInstance);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Solution

Object does not know its generic type at execution time Just create a new instance type (Java. Util. ArrayList) The target object will not know the difference (because there is no difference)

Basically, Java generics is a compile time technique. Metadata is used in compiled classes, and only conversion is performed at execution time For more information, see the Java genetics FAQ