package fouth;

public class InterfaceTest {
   
    public static void main(String[] args) {
        Student astudent=new Student("tom","123456");
        //astudent.setAddress("beijing");
        astudent.setSex("men");
        System.out.println(astudent);
    }
}
interface Person{
    String getName();
    String getSex();
    String getBirthday();
    String getAddress();
    //void setAddress(String strAddress);   
}
class Student implements Person{
    private String strName="";
    private String strSex="";
    private String strNumber="";
    private String strBirthday="";
    private String strSpeciality="";
    private String strAddress="";
    public String getSex() {
        return strSex;
    }
    public void setSex(String strSex) {
        this.strSex = strSex;
    }
    public String getBirthday() {
        return strBirthday;
    }
    public void setBirthday(String strBirthday) {
        this.strBirthday = strBirthday;
    }
    public String getSpeciality() {
        return strSpeciality;
    }
    public void setSpeciality(String strSpeciality) {
        this.strSpeciality = strSpeciality;
    }
    public String getAddress() {
        return strAddress;
    }
   
    public String getName() {
        return strName;
    }
    public String getNumber() {
        return strNumber;
    }
    public Student(String strName, String strNumber) {
        super();
        this.strName = strName;
        this.strNumber = strNumber;
    }
    public String toString(){
        String information="学生姓名="+strName+",学号="+strNumber;
        if(!strSex.equals("")){
            information+=",性别="+strSex;
        }
        if(!strBirthday.equals("")){
            information+=",出生年月="+strBirthday;
        }
        if(!strSpeciality.equals("")){
            information+=",专业="+strSpeciality;
        }
        if(!strAddress.equals("")){
            information+=",籍贯="+strAddress;
        }
        return information;   
    }
    //public void setAddress(String strAddress) {
        //this.strAddress=strAddress;
        
    }
   
}
其中Stduent类显示“已经定义的类型”，找不出原因，而且在接口中定义的方法setAddress()也实现不了，迷惑迷惑。。。