打开App
Java编程思想-7.4结合使用组合和继承-编译器强制初始化基类
Java编程思想-7.4结合使用组合和继承-编译器强制初始化基类，并要求你在构造器起始处就要这么做，但并不监督你将成员对象也初始化
Java编程思想导读—语法精讲—理论证明-实操指导31/90
App03:09
App11:59
App02:29
App07:19
App20:41
App07:18
App21:41
App14:36
App06:02
App12:05
App20:22
App12:32
App04:43
App04:56
App03:36
App01:24
App02:44
App13:43
App12:05
App12:19
App16:57
App13:46
App05:38
App08:19
App11:13
App03:43
App14:10
App03:11
App31:00
App15:22
App07:25打开App观看
