getGenericSuperclass与getSuperclass解说
一.说明
1.Class<? super T> getSuperclass():返回本类的父类
2.Type getGenericSuperclass():返回本类的父类,包含泛型参数信息
二.例子
1.ClassA.java
- public class ClassA <T>{
- private T obj;
- public void setObject(T obj) {
- this.obj = obj;
- }
- public T getObject() {
- return obj;
- }
- }
public class ClassA <T>{ private T obj; public void setObject(T obj) { this.obj = obj; } public T getObject() { return obj; } } 2.Test.java
- imp
ort java.lang.reflect.Type; - imp
ort java.lang.reflect.ParameterizedType; - public class Test<T> extends ClassA<T>{
- public static void main(String args[]) throws Exception{
- System.out.println("======getSuperclass======:");
- System.out.println(Test.class.getSuperclass().getName());
- System.out.println("======getGenericSuperclass======:");
- Type t = Test.class.getGenericSuperclass();
- System.out.println(t);
- if (ParameterizedType.class.isAssignableFrom(t.getClass())) {
- System.out.print("----------->getActualTypeArguments:");
- for (Type t1:((ParameterizedType)t).getActualTypeArguments()) {
- System.out.print(t1 + ",");
- }
- System.out.println();
- }
- }
- }
import java.lang.reflect.Type; imp ort java.lang.reflect.ParameterizedType; public class Test<T> extends ClassA<T>{ public static void main(String args[]) throws Exception{ System.out.println("======getSuperclass======:"); System.out.println(Test.class.getSuperclass().getName()); System.out.println("======getGenericSuperclass======:"); Type t = Test.class.getGenericSuperclass(); System.out.println(t); if (ParameterizedType.class.isAssignableFrom(t.getClass())) { System.out.print("----------->getActualTypeArguments:"); for (Type t1:((ParameterizedType)t).getActualTypeArguments()) { System.out.print(t1 + ","); } System.out.println(); } } }
输出结果:
======getSuperclass======:
ClassA
======getGenericSuperclass======:
ClassA<T>
----------->getActualTypeArguments:T,
