[7.4.1 类与类加载器](7.4.1%E7%B1%BB%E4%B8%8E%E7%B1%BB%E5%8A%A0%E8%BD%BD%E5%99%A8.md) [7.4.2 双亲委派模型](7.4.2%E5%8F%8C%E4%BA%B2%E5%A7%94%E6%B4%BE%E6%A8%A1%E5%9E%8B.md) [7.4.3 破坏双亲委派模型](7.4.3%E7%A0%B4%E5%9D%8F%E5%8F%8C%E4%BA%B2%E5%A7%94%E6%B4%BE%E6%A8%A1%E5%9E%8B.md)