花了两天时间搞定了通讯录,基本功能能实现

现在拿出来给大家一起交流,希望大家能找出bug

截图如下

以下是代码:请保留作者版权,谢谢

 //=====================messagemidlet主类=============================== package messagemidlet; //主类 import javax.microedition.midlet.*; import javax.microedition.lcdui.*; public class messagemidlet extends midlet  {   public static messagemidlet messagemidlet;   private menumidlet menumidlet = new menumidlet();   /** constructor */   public messagemidlet() {     messagemidlet = this;   }   /** main method */   public void startapp() {     display.getdisplay(this).setcurrent(menumidlet);   }   /** handle pausing the midlet */   public void pauseapp() {   }   /** handle destroying the midlet */   public void destroyapp(boolean unconditional) {   }   /** quit the midlet */   public static void quitapp() {     messagemidlet.destroyapp(true);     messagemidlet.notifydestroyed();     messagemidlet = null;   } } //=========================end================================ //=========================setget操作用到的属性================================ package messagemidlet; ///java为什么不像c#一样有get set 来设置属性，所以麻烦点，我还是喜欢c# public class setget {   public static int id = 0;   public static int delid = 0;   public static int modid = 0;   public static string str = null;   public static boolean isok =true ;   /** constructor */   public setget() {   }   public static void setid(int id){     id = id;   }   public static int getid(){     return id;   }   public static void setdelid(int id) {     delid = id;   }   public static int getdelid() {     return delid;   }   public static void setmodid(int id) {     modid = id;   }   public static int getmodid() {     return modid;   }   public static void setstr(string str){     str = str;   }   public static string getstr(){     return str;   }   public static void setistrue(boolean istrue){     isok = istrue;   }   public static boolean getistrue(){     return isok;   }   } //=========================end================================ //=========================pubclass公共类(集成一些常用属性和方法,方便调用)================================ package messagemidlet; import javax.microedition.lcdui.*; import javax.microedition.rms.*; import java.io.*; public class pubclass  {   public static pubclass pubclass;   public display display; //舞台对象   public command exitcommand; //离开按钮对象   public command selectcommand; //选择按钮对象   public command menucommand;  //主目录   public command okcommand ;   public command opercommand;   public string[] menulist = {'通讯录','关于作者'}; //主菜单选项   public string[] mainlist ={'浏览联系人','查找联系人','添加联系人','其他'};   public string[] operatelist={'编辑联系人','删除联系人','全部删除'};  //操作   //只需修改personpro属性，其他自动生成，构造   public string[] personpro ={'姓名','手机','email','地址','其他'}; //用户属性   public int length = personpro.length; //用户属性个数   public string dataname = 'messages'; //数据库名   public boolean existingornot = existing(dataname);   recordstore rs = null;   public textfield[] person  = new textfield[length];   public stringitem[] persondetail = new stringitem[length];   /** 构造函数 */   public pubclass() {     for(int i=0;inew  textfield(personpro[i], '', 256, textfield.any);       persondetail[i] = new  stringitem(personpro[i],'');     }   }   //取得主目录列表   public string get_menulist(int i){     if(this.mainlist.length<0){       return '';     }     return this.menulist[i];   }  //取得通讯录列表   public string get_mainlist(int j){     if(this.mainlist.length<0){       return '';     }     return this.mainlist[j];   }   //取得联系人操作列表   public string get_operatelist(int j){   if(this.operatelist.length<0){     return '';   }   return this.operatelist[j]; } //返回关于 public void return_aboutmidlet() {   aboutmidlet aboutmidlet = new aboutmidlet();   display.getdisplay(messagemidlet.messagemidlet).setcurrent(aboutmidlet); }  //返回主目录  public void return_mainmidlet() {    mainmidlet mainmidlet = new mainmidlet();    display.getdisplay(messagemidlet.messagemidlet).setcurrent(mainmidlet);  }  //返回通讯录列表   public void return_menumidlet(){     menumidlet menumidlet = new menumidlet();     display.getdisplay(messagemidlet.messagemidlet).setcurrent(menumidlet);   }   //返回联系人列表   public void return_personlistmidlet(){     personlistmidlet personlistmidlet = new personlistmidlet();     display.getdisplay(messagemidlet.messagemidlet).setcurrent(personlistmidlet);   }   //返回查找联系人   public void return_searchpersonmidlet(){   }   //返回添加联系人   public void return_addpersonmidlet(){     addpersonmidlet addpersonmidlet = new addpersonmidlet();     display.getdisplay(messagemidlet.messagemidlet).setcurrent(addpersonmidlet);   }   //返回操作   public void return_operatemidlet(){     operatemidlet operatemidlet = new operatemidlet();     display.getdisplay(messagemidlet.messagemidlet).setcurrent(operatemidlet);   }   //返回查找   public void return_searchmidlet() {     searchmidlet searrchmidlet = new searchmidlet();     display.getdisplay(messagemidlet.messagemidlet).setcurrent(searrchmidlet);   }   //返回查找结果   public void return_searchoutmidlet() {     searchoutmidlet searrchoutmidlet = new searchoutmidlet();     display.getdisplay(messagemidlet.messagemidlet).setcurrent(searrchoutmidlet);   }  //返回编辑   public void return_modifypersonmidlet() {     modifypersonmidlet modiftpersonmidlet = new modifypersonmidlet();     display.getdisplay(messagemidlet.messagemidlet).setcurrent(modiftpersonmidlet);   }   //返回联系人详细列表,并传入对应id值 modifypersonmidlet   public void return_persondetailmidlet(){     persondetailmidlet persondetailmidlet = new persondetailmidlet();     display.getdisplay(messagemidlet.messagemidlet).setcurrent(persondetailmidlet);   }   //警告窗口   public void alert(string alertstring){     alert alert = new alert('提示',alertstring,createimage('/images/1.png'),alerttype.error);     alert.settimeout(2000);     display.getdisplay(messagemidlet.messagemidlet).setcurrent(alert);   }   //警告窗口,提示后返回mainmidlet   public void alert(string alertstring,mainmidlet mainmidlet){     alert alert = new alert('提示',alertstring,createimage('/images/1.png'),alerttype.error);     alert.settimeout(2000);     display.getdisplay(messagemidlet.messagemidlet).setcurrent(alert,mainmidlet);   }   //警告窗口,提示后返回personlistmidlet   public void alert(string alertstring, personlistmidlet personlistmidlet) {     alert alert = new alert('提示', alertstring, createimage('/images/1.png'),alerttype.error);     alert.settimeout(2000);     display.getdisplay(messagemidlet.messagemidlet).setcurrent(alert, personlistmidlet);   }   //创建图像   public static image createimage(string name){       image aimage = null;       try{          aimage = image.createimage(name);       }       catch(ioexception e){       }       return aimage;  } //判断数据库是否存在，打开,然会recordstore对象  public recordstore open(){    boolean existingornot = false;    boolean ok = true;    existingornot = this.existing(dataname);    if (existingornot) {      try {        rs = recordstore.openrecordstore(dataname, false);      }      catch (exception e) {        ok = false;      }    }      else {        try {          rs = recordstore.openrecordstore(dataname, true);          ok = true;        }        catch (exception e) {          ok = false;        }      }        return rs;    }  //判断字符大小  public boolean existing(string recordstorestring) {    boolean existingornot = false;    recordstore rs = null;    if (recordstorestring.length() > 32)      return false;    try {      rs = recordstore.openrecordstore(recordstorestring, false);    }    catch (recordstorenotfoundexception e) {      existingornot = false;    }    catch (exception e) {    }    finally {      try {        rs.closerecordstore();      }      catch (exception e) {      }    }    return existingornot;  } } //=========================end================================ //=========================personclass用户属性类================================ package messagemidlet; //联系人属性类 import java.io.*; import javax.microedition.rms.*; public class personclass  {   private static personclass personclass;   //构造公共类实例   private pubclass pubclass = new pubclass();   public static int id = -1; //设置静态id，赋值后不需要重新构造而不能调用   //联系人属性,数组   public string[] personpro = new string[pubclass.length] ;   public void write(string[] personpro){     for(int i = 0;ithis.personpro[i] = personpro[i];     }   }   //设置id，起修改，删除，显示作用   public void setrecordid(int id){     this.id = id;   }   //取得id   public static int getrecordid(){     return id;   }   //转换为字节   public byte[] changetobytearray(){   byte[] data = null;   try{     bytearrayoutputstream baos = new bytearrayoutputstream();     dataoutputstream dos = new dataoutputstream(baos);     for(int j=0;j<this.personpro.length;j++){       dos.writeutf(this.personpro[j]);     }     data = baos.tobytearray();     baos.close();     dos.close();   }   catch(exception e){     return null;   }   return data;   }   public void changefrombytearray(byte[] data) {     try {       bytearrayinputstream bais = new bytearrayinputstream(data);       datainputstream dis = new datainputstream(bais);       for(int k=0;kthis.personpro[k] = dis.readutf();       }       bais.close();       dis.close();     }     catch (exception e) {     }   }   public string getperson(int m) {     return this.personpro[m];   }   public string getlistname(int recordid){     return this.personpro[0];   } } //=========================end================================ //=========================menumidlet主目录里表类================================ package messagemidlet; import javax.microedition.lcdui.*; import java.io.*; public class menumidlet extends list implements commandlistener {   //构造公共类实例   private pubclass pubclass = new pubclass();   /** constructor */   public menumidlet() {     super('通讯录',list.implicit);     for(int i=0;ithis.append(pubclass.get_menulist(i),pubclass.createimage('/images/tel.png'));     }     //构造按钮     pubclass.selectcommand = new command('选择', command.screen, 2);     pubclass.exitcommand = new command('离开', command.exit, 1);     //添加监听     this.addcommand(pubclass.exitcommand);     this.addcommand(pubclass.selectcommand);     this.setcommandlistener(this);   }   public void commandaction(command c, displayable d) {     if(c == pubclass.selectcommand ){       int selectitem = this.getselectedindex();      //尽量不使用switch，用if提高速度，虽然麻烦点，经验所得      if (selectitem == 0) {        pubclass.return_mainmidlet();      }      if (selectitem == 1) {        pubclass.return_aboutmidlet();      }    }     //退出     if(c == pubclass.exitcommand){       messagemidlet.quitapp();     }   } } //=========================end================================ //=========================aboutmidlet关于作者类(显示作者信息)================================ package messagemidlet; import javax.microedition.midlet.*; import javax.microedition.lcdui.*; import javax.microedition.lcdui.command; import javax.microedition.lcdui.displayable; public class aboutmidlet  extends form implements commandlistener {   //构造公共类实例   private pubclass pubclass = new pubclass();   /** constructor */   public aboutmidlet() {     super('');     this.settitle('关于作者');     stringitem stringitem = new stringitem('作者介绍','01网通(2)02号. 姓名:sukey. 版权所有:sukey.');     this.append(stringitem);     //构造按钮     pubclass.menucommand = new command('主目录', command.screen, 1);     pubclass.exitcommand = new command('离开', command.back, 1);     //添加监听     this.addcommand(pubclass.menucommand);     this.addcommand(pubclass.exitcommand);     this.setcommandlistener(this);   }   public void commandaction(command c, displayable d) {     if(c ==pubclass.menucommand  ){       pubclass.return_menumidlet();     }     if(c == pubclass.exitcommand){        messagemidlet.quitapp();     }   } } //=========================end================================ //=========================mainmidlet通讯录里表类================================ package messagemidlet; // import javax.microedition.lcdui.*; public class mainmidlet extends list implements commandlistener {   //构造公共类实例   private pubclass pubclass  = new pubclass();   /** constructor */   public mainmidlet() {     super('通讯录',list.implicit);     //显示列表     for(int i=0;ithis.append(pubclass.get_mainlist(i),pubclass.createimage('/images/tel.png'));     }     //构造按钮     pubclass.selectcommand = new command('选择', command.ok, 1);     pubclass.menucommand = new command('主目录', command.exit, 2);    //添加监听     this.addcommand(pubclass.selectcommand);     this.addcommand(pubclass.menucommand);     this.setcommandlistener(this);   }   public void commandaction(command c, displayable d) {     if (c == pubclass.selectcommand) {       int selectitem = this.getselectedindex();       //尽量不使用switch，用if提高速度，虽然麻烦点，经验所得       if (selectitem == 0) {         pubclass.return_personlistmidlet();       }       if (selectitem == 1) {         pubclass.return_searchmidlet();       }       if (selectitem == 2) {         pubclass.return_addpersonmidlet();       }       if (selectitem == 3) {       }     }     if(c == pubclass.menucommand){       pubclass.return_menumidlet();     }   } } //=========================end================================ //=========================addpersonmidlet添加联系人类================================ package messagemidlet; import javax.microedition.lcdui.*; import javax.microedition.rms.*; public class addpersonmidlet extends form implements commandlistener {   //构造公共类实例   private pubclass pubclass = new pubclass();   /** constructor */   public addpersonmidlet() {     super('');     this.settitle('添加联系人');      for(int i=0;ithis.append(pubclass.person[i]);      }     //构造按钮     pubclass.exitcommand = new command('返回', command.ok, 1);     pubclass.okcommand = new command('保存', command.back, 2);     //添加监听     this.addcommand(pubclass.exitcommand);     this.addcommand(pubclass.okcommand);     this.setcommandlistener(this);   }   //添加记录   private void addrecord(){     recordstore rs =null;     rs = pubclass.open();       try {       //取得textfield每个直，以数组形式保存       string[] getstring = new string[pubclass.length];       for(int i=0;i//构造personclass实例       personclass personclass = new personclass();       personclass.write(getstring);       byte[] data = personclass.changetobytearray();       int recordid = personclass.getrecordid();       if (recordid != -1) {         rs.setrecord(recordid, data, 0, data.length);       }       else {         //添加记录         recordid = rs.addrecord(data, 0, data.length);     }     setget.setdelid(0);     mainmidlet mainmidlet = new mainmidlet();     pubclass.alert('添加成功！返回中.......', mainmidlet);   }     catch (exception e) {        pubclass.alert('添加联系人失败');     }   }   public void commandaction(command c, displayable d) {     if(c == pubclass.okcommand){       //判断至少要填写姓名      if(pubclass.person[0].getstring() == null || pubclass.person[0].getstring() == '' ){         pubclass.alert('至少要填写姓名');       }else{         //添加记录         addrecord();       }     }     if(c == pubclass.exitcommand){       pubclass.return_mainmidlet();     }   } } //=========================end================================ //=========================personlistmidlet联系人列表类(显示联系人列表)================================ package messagemidlet; import javax.microedition.lcdui.*; import javax.microedition.rms.*; public class personlistmidlet extends list implements commandlistener {   //构造公共类实例   private pubclass pubclass = new pubclass();   private personclass personclass = new personclass();   public int[] recordids;   /** constructor */   public personlistmidlet() {     super('联系人列表',list.implicit);     personlist();     //构造按钮     pubclass.selectcommand = new command('查看', command.screen, 2);     pubclass.exitcommand = new command('编辑', command.exit, 1);     //添加监听     this.addcommand(pubclass.exitcommand);     this.addcommand(pubclass.selectcommand);     this.setcommandlistener(this);   } //用户列表   public void personlist() {     recordstore rs = null;     rs = pubclass.open();     try {       byte[] data;       //建立枚举,取出记录       recordenumeration re = rs.enumeraterecords(null, null, false);       //判断是否又记录       if (re.hasnextelement()) {         int records=re.numrecords();//取得记录数          recordids=new int[records];//recordid记录数组         for(int i=0;i//保存id             data = rs.getrecord(recordids[i]);             personclass.changefrombytearray(data);             this.append(''+personclass.getperson(0)+'',pubclass.createimage('/images/per.png'));//插入此record名称           }           setget.setistrue(true);       }       else {         this.append('还未添加联系人?', null);         setget.setistrue(false);       }     }     catch (exception e) {     }   }   //全局变量id   private void setgetid() {     int itemid = this.getselectedindex();     setget.setid(recordids[itemid]);   }   //全局变量delid   private void setgetdelid() {     int itemid = this.getselectedindex();     setget.setdelid(recordids[itemid]);   }   private void setgetmodid(){     int itemid = this.getselectedindex();     setget.setmodid(recordids[itemid]);   }   //提示信息并返回   public void alernone(){     mainmidlet mainmidlet = new mainmidlet();     pubclass.alert('无法操作',mainmidlet);   }   public void commandaction(command c, displayable d) {     if(c ==pubclass.exitcommand ){       if (setget.getistrue()){         this.setgetdelid();         this.setgetmodid();         pubclass.return_operatemidlet();       }else{         alernone();       }     }     if(c ==pubclass.selectcommand ){       if (setget.getistrue()){         this.setgetid();         pubclass.return_persondetailmidlet();       }else{         alernone();       }   }   } } //=========================end================================ //=========================searchmidlet查找类================================ package messagemidlet; import javax.microedition.midlet.*; import javax.microedition.lcdui.*; import javax.microedition.lcdui.command; import javax.microedition.lcdui.displayable; public class searchmidlet  extends textbox implements commandlistener{   //构造公共类实例   private pubclass pubclass = new pubclass();   /** constructor */   public searchmidlet() {     super('查找联系人','',256,0);     //构造按钮     pubclass.menucommand = new command('查找', command.screen, 1);     pubclass.okcommand = new command('主目录', command.back, 1);    //添加监听     this.addcommand(pubclass.menucommand);     this.addcommand(pubclass.okcommand);     this.setcommandlistener(this);   }   public void commandaction(command c, displayable d) {     if(c ==pubclass.okcommand ){       pubclass.return_menumidlet();     }     if(c ==pubclass.menucommand){       //设置全局变量       setget.setstr(this.getstring());       pubclass.return_searchoutmidlet();     }   } } //=========================end================================ //=========================searchoutmidlet查找结果类================================ package messagemidlet; import javax.microedition.lcdui.*; import javax.microedition.rms.*; import java.io.*; public class searchoutmidlet extends list implements commandlistener {   //构造公共类实例   private pubclass pubclass = new pubclass();   private personclass personclass = new personclass();   public int[] recordids;   /** constructor */   public searchoutmidlet() {     super('查找结果', list.implicit);     personlist(); //构造按钮     pubclass.selectcommand = new command('查看', command.screen, 2);     pubclass.exitcommand = new command('编辑', command.exit, 1); //添加监听     this.addcommand(pubclass.exitcommand);     this.addcommand(pubclass.selectcommand);     this.setcommandlistener(this);   } //用户列表   public void personlist() {     recordstore rs = null;     rs = pubclass.open();     try {       byte[] data;       //匹配       recordfilter rf = new namefilter();       //建立枚举,取出记录       recordenumeration re = rs.enumeraterecords(rf, null, false);       //判断是否又记录       if (re.hasnextelement()) {         int records=re.numrecords();//取得记录数          recordids=new int[records];//recordid记录数组         for(int i=0;i//保存id             data = rs.getrecord(recordids[i]);             personclass.changefrombytearray(data);             this.append(''+personclass.getperson(0)+'',pubclass.createimage('/images/per.png'));//插入此record名称           }           setget.setistrue(true);       }       else {         this.append('对不起,没有查找到', null);         setget.setistrue(false);       }     }     catch (exception e) {     }   }   //全局变量id   private void setgetid() {     int itemid = this.getselectedindex();     setget.setid(recordids[itemid]);   }   //全局变量modid   private void setgetmodid() {     int itemid = this.getselectedindex();     setget.setmodid(recordids[itemid]);   }   //全局变量delid   private void setgetdelid() {     int itemid = this.getselectedindex();     setget.setdelid(recordids[itemid]);   }   //提示信息并返回   public void alernone(){     mainmidlet mainmidlet = new mainmidlet();     pubclass.alert('无法操作',mainmidlet);   }   public void commandaction(command c, displayable d) {     if(c ==pubclass.exitcommand ){       if (setget.getistrue()){         this.setgetmodid();         this.setgetdelid();         pubclass.return_operatemidlet();       }else{         alernone();       }     }     if(c ==pubclass.selectcommand ){       if (setget.getistrue()){         this.setgetid();         pubclass.return_persondetailmidlet();       }else{         alernone();       }   } } } class namefilter implements recordfilter{         public boolean matches(byte[] candidate){                 datainputstream person = new datainputstream(new bytearrayinputstream(candidate));                 string personcname = '';                 try{                  personcname = person.readutf();            }            catch(exception e){            }            personclass personclass = new personclass();            if(personcname.equals(setget.getstr())) return true;            else return false;         } } //=========================end================================ //=========================persondetailmidlet指定联系人详细信息================================ package messagemidlet; import javax.microedition.lcdui.*; import javax.microedition.rms.*; public class persondetailmidlet extends form implements commandlistener {   //构造公共类实例   private pubclass pubclass = new pubclass();   /** constructor */   public persondetailmidlet() {     super('');     this.constructorlist();     //构造按钮     pubclass.selectcommand = new command('返回', command.screen, 2);     pubclass.exitcommand = new command('主目录', command.exit, 1);     //添加监听     this.addcommand(pubclass.exitcommand);     this.addcommand(pubclass.selectcommand);     this.setcommandlistener(this);   }   //构造list，显示详细信息   private void constructorlist() {     try {       this.getpersondetail();     }     catch (recordstoreexception ex) {     }   }   //绑定对应id数据，并显示   private void getpersondetail() throws recordstoreexception {     recordstore rs = null;     //打开数据库     rs = pubclass.open();     //建立枚举,取得对应id的详细信息     try {       byte[] data;       recordenumeration re = rs.enumeraterecords(null, null, false);       data = rs.getrecord(setget.getid());       //重新构造,并把byte转换为string类型       personclass personclass = new personclass();       personclass.changefrombytearray(data);       //重新设置用户id       int recordid = rs.getnextrecordid();       //给对应的属性赋值       for (int i = 0; i < pubclass.persondetail.length; i++) {         this.append(pubclass.persondetail[i]);         pubclass.persondetail[i].settext(personclass.getperson(i));       }       //设置标题为用户名       this.settitle(personclass.getperson(0));     }     catch (recordstorenotopenexception ex) {     }   }   public void commandaction(command c, displayable d) {     if(c == pubclass.selectcommand){       pubclass.return_personlistmidlet();     }     if(c == pubclass.exitcommand){       pubclass.return_menumidlet();     }   } } //=========================end================================ //=========================operatemidlet操作联系人类(这里只有删除功能)================================ package messagemidlet; import javax.microedition.midlet.*; import javax.microedition.lcdui.*; import javax.microedition.rms.*; public class operatemidlet extends list implements commandlistener {   //构造公共类实例   private pubclass pubclass = new pubclass();   /** constructor */   public operatemidlet() {     super('联系人', list.implicit);     for (int i = 0; i < pubclass.operatelist.length; i++) {       this.append(pubclass.get_operatelist(i), pubclass.createimage('/images/edit.png'));     }     //构造按钮     pubclass.opercommand = new command('选择', command.screen, 2);     pubclass.menucommand = new command('主目录', command.exit, 1);     //添加监听     this.addcommand(pubclass.menucommand);     this.addcommand(pubclass.opercommand);     this.setcommandlistener(this);   } //删除指定记录   public void del(int delid) {     personclass personclass = new personclass();     recordstore rs = null;     rs = pubclass.open();     try {       //判断是否又记录       if(rs.getnumrecords()<1){         pubclass.alert('还未添加记录！返回中.......');       }else{         //bug         rs.deleterecord(delid);         alertinfo('删除成功！返回中.......');       }     }     catch (exception e) {       alertinfo('删除失败！返回中.......');     }   } //全部删除记录   public void delall() {     personclass personclass = new personclass();     recordstore rs = null;     rs = pubclass.open();     //判断是否又记录     try {       if (rs.getnumrecords() < 1) {         pubclass.alert('还未添加记录！返回中.......');       }       else {         //构造recordenumeration实例,取出记录         recordenumeration re = rs.enumeraterecords(null, null, false);         //根据id,循环删除         while (re.hasnextelement()) {           int recoidid = re.nextrecordid();           rs.deleterecord(recoidid);         }         alertinfo('删除成功！返回中.......');       }     }     catch (exception e) {        alertinfo('删除失败！返回中.......');     }   }   public void alertinfo(string info){     personlistmidlet personlistmidlet = new personlistmidlet();     pubclass.alert(in, fo,personlistmidlet);   }   public void commandaction(command c, displayable d) {     if(c ==pubclass.menucommand  ){       pubclass.return_menumidlet();     }     if(c ==pubclass.opercommand ){       int selectitem = this.getselectedindex();      //尽量不使用switch，用if提高速度，虽然麻烦点，经验所得      if (selectitem == 0) {        pubclass.return_modifypersonmidlet();      }      if (selectitem == 1) {        del(setget.getdelid());        setget.setdelid(0);      }      if (selectitem == 2) {        delall();        setget.setdelid(0);      }     }   } } //=========================end================================ //=========================modifypersonmidlet修改指定联系人详细信息================================ package messagemidlet; import javax.microedition.lcdui.*; import javax.microedition.rms.*; public class modifypersonmidlet extends form implements commandlistener  {   //构造公共类实例   private pubclass pubclass = new pubclass();   /** constructor */   public modifypersonmidlet() {     super('');     try {       this.getpersondetail();     }     catch (recordstoreexception ex) {     }      //构造按钮     pubclass.exitcommand = new command('主目录', command.ok, 1);     pubclass.okcommand = new command('修改', command.back, 2);    //添加监听     this.addcommand(pubclass.exitcommand);     this.addcommand(pubclass.okcommand);     this.setcommandlistener(this);   }   //绑定对应id数据，并显示   private void getpersondetail() throws recordstoreexception {     recordstore rs = null;     //打开数据库     rs = pubclass.open();     //建立枚举,取得对应id的详细信息     try {       byte[] data;       recordenumeration re = rs.enumeraterecords(null, null, false);       data = rs.getrecord(setget.getmodid());       //重新构造,并把byte转换为string类型       personclass personclass = new personclass();       personclass.changefrombytearray(data);       //重新设置用户id       int recordid = rs.getnextrecordid();       //给对应的属性赋值       for (int i = 0; i < pubclass.person.length; i++) {         this.append(pubclass.person[i]);         pubclass.person[i].setstring(personclass.getperson(i));       }       //设置标题为用户名       this.settitle('修改'+personclass.getperson(0));     }     catch (recordstorenotopenexception ex) {     }     rs.closerecordstore();   }   //修改联系人   public void updataperson() {     recordstore rs = null;     rs = pubclass.open();     try {       //取得textfield每个直，以数组形式保存       string[] getstring = new string[pubclass.length];       for (int i = 0; i < pubclass.length; i++) {         getstring[i] = pubclass.person[i].getstring();       }       //构造personclass实例       personclass personclass = new personclass();       personclass.write(getstring);       byte[] data = personclass.changetobytearray();       int recordid = personclass.getrecordid();       if (recordid != -1) {         rs.setrecord(recordid, data, 0, data.length);       }       else {         //修改记录         rs.setrecord(setget.getmodid(),data,0,data.length);//rs.setrecord(setget.getmodid(), data,0, data.length);         personclass.setrecordid(recordid);       }       setget.setmodid(0);       personlistmidlet personlistmidlet = new personlistmidlet();       pubclass.alert('修改成功！返回中.......',personlistmidlet);     }     catch (exception e) {       personlistmidlet personlistmidlet = new personlistmidlet();       pubclass.alert('修改失败',personlistmidlet);     }   }   public void commandaction(command c, displayable d) {     if(c == pubclass.exitcommand){       pubclass.return_menumidlet();     }     if(c == pubclass.okcommand){       //判断至少要填写姓名       if (pubclass.person[0].getstring() == null || pubclass.person[0].getstring() == '') {         pubclass.alert('至少要填写姓名');       }       else {         this.updataperson();       }     }   } } //=========================end================================