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- import java.util.*;
- import java.lang.reflect.*;
- public class GenericTest
- {
- private Map<String , Integer> score;
- public static void main(String[] args) throws Exception
- {
- Class<GenericTest> clazz = GenericTest.class;
- Field f = clazz.getDeclaredField("score");
- // 直接使用getType()取出Field类型只对普通类型的Field有效
- Class<?> a = f.getType();
- // 下面将看到仅输出java.util.Map
- System.out.println("score的类型是:" + a);
- // 获得Field实例f的泛型类型
- Type gType = f.getGenericType();
- // 如果gType类型是ParameterizedType对象
- if(gType instanceof ParameterizedType)
- {
- // 强制类型转换
- ParameterizedType pType = (ParameterizedType)gType;
- // 获取原始类型
- Type rType = pType.getRawType();
- System.out.println("原始类型是:" + rType);
- // 取得泛型类型的泛型参数
- Type[] tArgs = pType.getActualTypeArguments();
- System.out.println("泛型类型是:");
- for (int i = 0; i < tArgs.length; i++)
- {
- System.out.println("第" + i + "个泛型类型是:" + tArgs[i]);
- }
- }
- }
- }
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