Java中的类 getTypeParameters() 方法和示例

Java.lang.Class 类的getTypeParameters()方法用于获取该实体的类型参数。该实体可以是类、数组、接口等。该方法返回表示类型变量的 TypeVariable 对象数组。
句法：

public TypeVariable> getTypeParameters()

参数：此方法不接受任何参数。
返回值：此方法返回表示类型变量的 TypeVariable 对象数组。
下面的程序演示了 getTypeParameters() 方法。
示例 1：

Java

// Java program to demonstrate getTypeParameters() method
 
import java.util.*;
 
public class Test {
    public static void main(String[] args)
        throws ClassNotFoundException
    {
 
        // returns the Class object for this class
        Class myClass = Class.forName("Test");
 
        System.out.println("Class represented by myClass: "
                           + myClass.toString());
 
        // Get the type parameters of myClass
        // using getTypeParameters() method
        System.out.println(
            "TypeParameters of myClass: "
            + Arrays.toString(
                  myClass.getTypeParameters()));
    }
}

输出：

Class represented by myClass: class Test
TypeParameters of myClass: []

示例 2：

Java

// Java program to demonstrate getTypeParameters() method
 
import java.util.*;
 
public class Test {
 
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object for this class
        Class myClass = Class.forName("java.lang.Integer");
 
        System.out.println("Class represented by myClass: "
                           + myClass.toString());
 
        // Get the type parameters of myClass
        // using getTypeParameters() method
        System.out.println(
            "TypeParameters of myClass: "
            + Arrays.toString(
                  myClass.getTypeParameters()));
    }
}

输出：

Class represented by myClass: class java.lang.Integer
TypeParameters of myClass: []

参考： https://docs.oracle.com/javase/9/docs/api/ Java/lang/Class.html#getTypeParameters–