TAG:
我问一个很菜的问题,我在一个包里定义了四个类文件,每个类文件都用public来修饰,当我运行时,系统报错,让我删掉一个,我任意删除一个都会正常运行, 请问使用public有什么限制吗? public class People{ String Name; String Num="01"; String Sex; int Ages; public String ShowInfo(){ return("姓名:"+Name+" 性别:"+Sex+" 年龄:"+Ages); } } public class Student extends People { String Num; String ClassNo; public String ShowInfo(){ return("学号:"+Num+super.Num+" "+super.ShowInfo()+"班号:"+ClassNo); } } public class Teacher extends People { String Principalship; String Department; public String ShowInfo(){ return(super.ShowInfo()+"职务:"+Principalship+"部门:"+Department); } } public class TestPeople_2{ public static void main(String args[]){ Student NewPeople=new Student(); NewPeople.Name="宋菘"; NewPeople.Num="1001"; NewPeople.Ages=36; NewPeople.ClassNo="计算机 001"; System.out.println(NewPeople.ShowInfo()); } } (iwgh) |