Java Interface Usage Learning----------------Java Rookie learn to fly the first step

/*


* @ (#) Clsusage.java 1.0 04/12/25


*


* Can modify the template of this file in the


* directory. \jcreator\templates\template_1\project_name.java


*


* can also create your own project template by making a new


* folder in the directory. \jcreator\template\. Use the other


* Templates as examples.


*


*/


package myprojects.clsusage;


import java.util.*;


class Clsusage {





public Clsusage () {





}





public static void Main (String args[]) {


System.out.println ("Starting clsusage ...");


isplitpage isp=new userpage (12);


Isp.firstpage ();


while (Isp.haspages ())


{


Isp.nextpage ();


}





}


}


Interface Isplitpage


{


void FirstPage ();


void NextPage ();


boolean haspages ();


}


class Dateobj


{


private String name;


private int age;


private Boolean sex;


private int id;


public static int PersonID;


Static


{


personid=1000;


}


public dateobj (String na,int ag,boolean SX)


{


name=na;age=ag;sex=sx;


id=dateobj.personid++;


}


public dateobj (String Na,int AG)


{


name=na;age=ag;sex=true;


id=dateobj.personid++;


}


public int getId ()


{


return ID;


}


public String getName ()


{


return name;


}


public void SetName (String na)


{


Name=na;


}


public int getage ()


{


return age;


}


public void Setage (int dg)


{


AGE=DG;


}


public boolean issex ()


{


return this.sex;


}


public void Setsex (Boolean sx)


{


sex=sx;


}


public String toString ()


{


return "" +id+ "-" +name+ "-" +age+ "-" +sex;


}


}


class Userpage implements Isplitpage


{


//which can is accessed with itself or son


//Is independent of the package in which it or subclasses are located


protected int PageCount;


protected int pageIndex;


protected Java.util.Vector list;


public userpage (int pages)


{


if (pages<=0)


this.pagecount=10;


int age=20;


Boolean sex=false;


list=new Vector ();


for (int i=0;i<pages;i++)


{


String na= "" +i+ "";


dateobj ob=new dateobj (na,age+i,sex);


Sex=!sex;


list.addelement (OB);


}


this.pagecount=pages;


this.pageindex=1;


}


public void FirstPage ()


{


pageindex=1;


dateobj ob= (dateobj) list.get (pageIndex-1);


System.out.println ("first page" +ob.tostring ());


}


public void NextPage ()


{


pageindex++;


if (pageindex<=this.pagecount)


{


Dateobj ob= (dateobj) list.get (pageIndex-1);


System.out.println ("+pageindex+", "page" +ob.tostring);


}





}


public boolean haspages ()


{


return pageindex<=pagecount;


}


}