Java连载120-反射机制获取构造方法和父类、父接口

package com.bjpowernode.java_learning;

import java.lang.reflect.*;

​

public class D120_1_ConstructerOfClass {

  public static void main(String[] args) throws Exception{

    //1.获取类

    Class c = Class.forName("com.bjpowernode.java_learning.D120_Customer");

   

    //2.获取特定的构造方法

    Constructor con = c.getDeclaredConstructor(String.class,int.class);

   

    //3.创建对象

    Object o = con.newInstance("张三",25);

    System.out.println(o);

  }

​

}

class D120_Customer{

  String name;

  int age;

 

  D120_Customer(String name,int age){

    this.name = name;

    this.age = age;

   

  }

 

  public String toString() {

    return "Customer[" + name + "," + age + "]";

  }

}

package com.bjpowernode.java_learning;

import java.lang.reflect.*;

​

public class D120_2_ParentClassAndInterfaceOfClass {

  public static void main(String[] args) throws Exception{

    Class c = Class.forName("java.lang.String");

   

    //获取父类

    Class superClass = c.getSuperclass();

   

    System.out.println(superClass.getName());

    System.out.println("================");

       

      //获取父接口

      Class[] ins = c.getInterfaces();

      for(Class in:ins) {

        System.out.println(in.getName());

      }

  }

}