Created
December 26, 2018 12:59
-
-
Save why168/6c9f7e4b2660315292f79744d55a0aaf to your computer and use it in GitHub Desktop.
Java泛型
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
class Main { | |
public static void main(String[] args) { | |
Student.main(); | |
} | |
static class Person<T> { | |
} | |
static class Student extends Person<Student> { | |
static void main() { | |
Student st = new Student(); | |
Class clazz = st.getClass(); | |
// getSuperclass()获得该类的父类 | |
System.out.println(clazz.getSuperclass()); | |
// getGenericSuperclass()获得带有泛型的父类 | |
// Type是 Java 编程语言中所有类型的公共高级接口。它们包括原始类型、参数化类型、数组类型、类型变量和基本类型。 | |
Type type = clazz.getGenericSuperclass(); | |
System.out.println(type); | |
// ParameterizedType参数化类型,即泛型 | |
ParameterizedType p = (ParameterizedType) type; | |
// getActualTypeArguments获取参数化类型的数组,泛型可能有多个 | |
Class c = (Class) p.getActualTypeArguments()[0]; | |
System.out.println(c); | |
// 输出内容 | |
// class com.Main$Person | |
// com.Main.com.Main$Person<com.Main$Student> | |
// class com.Main$Student | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment