java接口用法学习----------------java菜鸟学飞第一步

答案：jcreator pro 2.5
jdk 1.4.2
===================================
/*
 * @(#)ClsUsage.java 1.0 04/12/25
 *
 * You can modify the template of this file in the
 * directory ..\JCreator\Templates\Template_1\Project_Name.java
 *
 * You 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 be accessed with itself or son
 //与自身或子类所在的包无关
 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("第一页"+ob.toString());
 }
 public void  nextPage()
 {
  pageIndex++;
  if (pageIndex<=this.pageCount)
  {
           dateObj ob=(dateObj)list.get(pageIndex-1);
          System.out.println("第"+pageIndex+"页"+ob.toString());
    }
    
 }
 public boolean  hasPages()
 {
  return   pageIndex<=pageCount;
 }
}

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