Java反射创建对象

一、通过类对象调用newInstance()方法，适用于无参构造方法

1.1 类名.class

public class Main {

    public static void main(String[] args) throws IllegalAccessException, InstantiationException {
        Class clazz = Person.class;
        Person person = clazz.newInstance();
        System.out.println(person instanceof Person); // true
    }
}

class Person {

    private Integer age;

    private String name;

    public Person() {
    }
}

1.2 Class.forName

public class Main {

    public static void main(String[] args) throws IllegalAccessException, InstantiationException, ClassNotFoundException {
        Class clazz = Class.forName("com.best.test.Person");
        Person person = (Person) clazz.newInstance();
        System.out.println(person instanceof Person); // true
    }
}

class Person {

    private Integer age;

    private String name;

    public Person() {
    }
}

1.3 对象名.getClass

public class Main {

    public static void main(String[] args) throws IllegalAccessException, InstantiationException{
        Person person = new Person();
        Class