Province [name=四川, population=87225224, cities=[成都, 绵阳, 德阳, 攀枝花, 遂宁, 江油], officials=[Official [name=zhangsan, title=mayor, age=45], Official [name=lisi, title=coutrier, age=55], Official [name=wangwu, title=villager, age=42]]]
Province [name=四川, population=87225224, cities=[成都, 绵阳, 德阳, 攀枝花, 遂宁, 江油], officials=[Official [name=zhangsan, title=mayor, age=45], Official [name=lisi, title=coutrier, age=55], Official [name=wangwu, title=villager, age=42]]]
这里只讲了List集合，Set,Map以及Properties以后再讲吧。