import java.io.FileInputStream;
import java.io.ObjectInputStream;
import java.lang.reflect.Constructor;
public class Student  {

    public void method(){
        System.out.println("Hello");
    }
    public static void main(String[] args) throws Exception {

        //通过new调用了无参构造创建对象
        Student student1 = new Student();
        student1.method();
        //通过Class类中的newInstance创建对象
        Student student2 = Student.class.newInstance();
        student2.method();
        //通过Constructor中的newInstance创建对象
        Constructor<Student> constructor = Student.class.getConstructor();
        Student student3 = constructor.newInstance();
        student3.method();
        //通过clone创建对象
        Student student4 =(Student) student3.clone();
        student4.method();
        //通过序列化和反序列化创建对象
        ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream("文件名"));
        Student student5 = (Student)objectInputStream.readObject();
        student5.method();
    }
}