定义一个People类，它包含属性有姓名name和性别sex和年龄age，一个构造方法，用来初始化这三个属性；定义一

public Class People{ private String name; private String sex; private Int age; public viod People(String name,String sex,Int age){ this.name = name; this.sex = sex; this.age = age; } }