Java reflection, which determines whether class is a subclass of a class or a parent class __class

Class C = arraylist.class;

C.isprimitive (); Determine if C is a basic data type

C.isassignablefrom (List.class); Determine if C is a subclass of the list class or a parent class

C.getgenerictype (); Get generic type

Instance: the generic type in the List<t> collection is obtained by reflection

Package com.zf.target;

Import Java.lang.reflect.Field;
Import Java.lang.reflect.ParameterizedType;
Import Java.lang.reflect.Type;
Import java.util.List;
Import Java.util.Map;

Class t{
	list<a>  A;
	List<b>  B;	List l;
	Map<integer, string> map;
	int c;
}

Class A {}
class b{} public

class test9{public

	static void Main (string[] args) {
		class TC = t.class;< c20/>field[] fields = Tc.getdeclaredfields ();
		for (Field f:fields) {
			Class FC = F.gettype ();
			if (fc.isprimitive ()) {
				System.out.println ("Base data type:" + f.getname () + "  " + fc.getname ());
			} else{
				if (Fc.isassignablefrom (List.class)) {//To determine whether the list
					System.out.println ("list type:" + f.getname ());
					Type GT = F.getgenerictype ();	Get generic type
					parameterizedtype pt = (parameterizedtype) gt;
					Class lll = (Class) pt.getactualtypearguments () [0];
					System.out.println ("\t\t" + lll.getname ());}}}}