- new
- clone()
通过反射机制创建
//用 Class.forName方法获取类,在调用类的newinstance()方法
Class<?> cls = Class.forName("com.dao.User");
User u = (User)cls.newInstance();
- 序列化反序列化
//将一个对象实例化后,进行序列化,再反序列化,也可以获得一个对象(远程通信的场景下使用)
ObjectOutputStream out = new ObjectOutputStream (new FileOutputStream("D:/data.txt"));
//序列化对象
out.writeObject(user1);
out.close();
//反序列化对象
ObjectInputStream in = new ObjectInputStream(new FileInputStream("D:/data.txt"));
User user2 = (User) in.readObject();
System.out.println("反序列化user:" + user2);
in.close();