[简介](%E5%8F%91%E9%80%81%E5%88%B0%E7%AE%80%E4%BB%8B.md) [构造函数](%E6%9E%84%E6%96%B9%E5%BC%8F%E9%80%A0%E5%87%BD%E6%95%B0.md) [创建对象](%E5%88%9B%E5%BB%BA%E5%AF%B9%E8%B1%A1.md) [继承](%E7%BB%A7%E6%89%BF%E5%8F%91%E9%80%81%E5%88%B0.md) [对象扩展](%E5%AF%B9%E8%B1%A1%E6%89%A9%E5%B1%95.md) [类](%E7%B1%BB%E5%8F%91%E9%80%81%E5%88%B0.md)