其他结构

package com.atguigu.java3;
import com.atguigu.java2.Person;
import org.junit.Test;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
/**
 * @author Dxkstart
 * @create 2021-06-07 19:24
 */
public class OtherTest {
    /*
    获取构造器结构
     */
    @Test
    public void test1() {
        Class<Person> clazz = Person.class;
        //getConstructors():获取当前运行时类中声明为public的构造器
        Constructor[] constructors = clazz.getConstructors();
        for (Constructor cons : constructors) {
            System.out.println(cons);
        }
        System.out.println();
        //getDeclaredConstructors():获取当前运行时类中声明的所有构造器
        Constructor[] declaredConstructors = clazz.getDeclaredConstructors();
        for (Constructor c : declaredConstructors) {
            System.out.println(c);
        }
    }
    /*
    获取运行时类的父类
     */
    @Test
    public void test2() {
        Class<Person> clazz = Person.class;
        Class superclass = clazz.getSuperclass();
        System.out.println(superclass);
    }
    /*
   获取运行时类的带泛型的父类
    */
    @Test
    public void test3() {
        Class<Person> clazz = Person.class;
        Type genericSuperclass = clazz.getGenericSuperclass();
        System.out.println(genericSuperclass);
    }
    /*
    获取运行时类的带泛型的父类的泛型
   */
    @Test
    public void test4() {
        Class<Person> clazz = Person.class;
        Type genericSuperclass = clazz.getGenericSuperclass();
        ParameterizedType paramType = (ParameterizedType) genericSuperclass;
        //获取泛型类型
        Type[] actualTypeArguments = paramType.getActualTypeArguments();
        System.out.println(actualTypeArguments[0].getTypeName());
    }
    /*
    获取运行时类实现的接口
     */
    @Test
    public void test5(){
        Class<Person> clazz = Person.class;
        Class[] interfaces = clazz.getInterfaces();
        for(Class c : interfaces){
            System.out.println(c);
        }
        System.out.println();
        //获取运行时类的父类实现的接口
        Class[] interfaces1 = clazz.getSuperclass().getInterfaces();
        for(Class c1: interfaces1){
            System.out.println(c1);
        }
    }
    /*
    获取运行时类所在的包
     */
    @Test
    public void test6(){
        Class<Person> clazz = Person.class;
        Package pack = clazz.getPackage();
        System.out.println(pack);
    }
    /*
    获取运行时类声明的注解
     */
    @Test
    public void test7(){
        Class<Person> clazz = Person.class;
        Annotation[] annotations = clazz.getAnnotations();
        for(Annotation a:annotations){
            System.out.println(a);
        }
    }
}