J2ME兑现的通讯录程式

import javax.microedition.midlet.*;import javax.microedition.lcdui.*;import javax.microedition.rms.*;public class AddressBook extends MIDlet implements CommandListener{	private Display display=null;	Command search=null;	Command quit=null;	Command delete=null;	Command addnow=null;		Command edit=null;	Command mainmenu=null;		List menu=null;	Form ui_form=null;	StringItem si=null;	TextField name=null;	TextField phone=null;	TextField nameForEdit=null;		RecordStore recordStore=null;//声明记录储存		public AddressBook()	{		display=Display.getDisplay(this);  //定义Display变量		quit=new Command("关闭",Command.SCREEN,3);//定义关闭按钮		search=new Command("查找",Command.SCREEN,2);//定义查询按钮		delete=new Command("删除",Command.SCREEN,2);//定义删除按钮		addnow=new Command("增加",Command.SCREEN,2);//定义增加按钮		edit=new Command("修改",Command.SCREEN,2);//定义修改按钮		mainmenu=new Command("主菜单",Command.SCREEN,2);//定义主菜单按钮	        //记录储存初始化		try 		{			recordStore=RecordStore.openRecordStore("address",true);		}		catch(RecordStoreException rse)		{			rse.printStackTrace();		}	}	public void startApp()	{		menu=new List("电话薄...",List.IMPLICIT);		menu.append("1.查询",null);		menu.append("2.增加",null);		menu.append("3.删除",null);		menu.append("4.修改",null);		menu.append("5.关闭",null);		menu.setCommandListener(this);		display.setCurrent(menu);		}	void searchScreen()  //查询用户界面	{		ui_form=new Form("电话薄查询");		 name=new TextField("查询姓名","",50,0);		ui_form.append(name);				ui_form.addCommand(search);		ui_form.addCommand(quit);				ui_form.setCommandListener(this);				display.setCurrent(ui_form);	}    void addScreen()    {    	ui_form=new Form("添加");		    	name=new TextField("姓名","",50,0);		ui_form.append(name);				phone=new TextField("电话号码","",50,0);		ui_form.append(phone);				ui_form.addCommand(addnow);		ui_form.addCommand(quit);				ui_form.setCommandListener(this);				display.setCurrent(ui_form);    }    void editScreen()    {    	ui_form=new Form("修改");		    	nameForEdit=new TextField("需要修改的姓名","",50,0);		ui_form.append(nameForEdit);				name=new TextField("姓名","",50,0);		ui_form.append(name);				phone=new TextField("电话号码","",50,0);		ui_form.append(phone);						ui_form.addCommand(edit);		ui_form.addCommand(quit);				ui_form.setCommandListener(this);				display.setCurrent(ui_form);    }    void deleteScreen()    {    	ui_form=new Form("删除");		    					name=new TextField("姓名","",50,0);		ui_form.append(name);										ui_form.addCommand(delete);		ui_form.addCommand(quit);				ui_form.setCommandListener(this);				display.setCurrent(ui_form);    }public void pauseApp(){	menu=null;}public void destroyApp(boolean unconditional){	menu=null;	notifyDestroyed();}public void commandAction(Command c,Displayable d){	if(c==quit)	{		try		{			close();		}			catch(RecordStoreException rse)		{			rse.printStackTrace();		}		destroyApp(true);		}else if(c==search){	String temp_search=name.getString();	address_search(temp_search);	}else if(c==edit){	String temp_nameForEdit=nameForEdit.getString();	String temp_name=name.getString();	String temp_phone=phone.getString();	address_edit(temp_nameForEdit,temp_name,temp_phone);	}else if(c==mainmenu){	startApp();}else if (c==delete){	String temp_delete=name.getString();	address_del(temp_delete);}else if(c==addnow){	String temp_name=name.getString();	String temp_phone=phone.getString();	address_add(temp_name,temp_phone);}else   //其他事件，根据list选项调用个界面{	List down=(List)display.getCurrent();	switch(down.getSelectedIndex())	{	case 0: searchScreen();break;	case 1: addScreen();break;	case 2: deleteScreen();break;	case 3: editScreen();break;	case 4: destroyApp(true);break;	}}}void address_search(String address){	String temp=" ";	String phone_number;	String person_name;	String check_name="";	int size=address.length();	try	{		RecordEnumeration re=			recordStore.enumerateRecords(null,null,false); //enumeration通过项目集允许对例程进行重复调用。	    ui_form=new Form("查询结果");		while(re.hasNextElement())		{			String name1=new String(re.nextRecord());			try			{				person_name=name1.substring(0,name1.indexOf("?"));			}			catch(Exception ef)			{				person_name="请检查姓名是否正确";				ef.printStackTrace();			}			if(person_name.length()>=size)			{				check_name=person_name.substring(0,size);							}			if(check_name.equals(address))			{				try{					phone_number=name1.substring(name1.indexOf("?")+1);					}				catch(Exception e)				{					phone_number="";				}		temp=temp+"\n姓名.."+person_name+"\n电话.."+phone_number;		}		}	//}if(temp.equals(" ")){	temp="没有找到......";}ui_form.append(temp);ui_form.addCommand(quit);ui_form.addCommand(mainmenu);ui_form.setCommandListener(this);display.setCurrent(ui_form);//}	}catch(RecordStoreNotOpenException rsnoe){	rsnoe.printStackTrace();}catch(InvalidRecordIDException irid){	irid.printStackTrace();	}catch(RecordStoreException rse){	rse.printStackTrace();}} void address_del(String address){	String temp=" ";	String phone_number;	String person_name;	int id;	int del_id=0;	try	{   RecordEnumeration re=		recordStore.enumerateRecords(null,null,false);	    ui_form=new Form("删除结果");	while(re.hasNextElement())	{		id=re.nextRecordId();		String name1=new String(recordStore.getRecord(id));		try		{			person_name=name1.substring(0,name1.indexOf("?")); //搜索截取特定的字符串		}		catch(Exception ef)		{			person_name="请检查姓名是否正确";			ef.printStackTrace();		}		if(person_name.equals(address))		{			del_id=id;		}	}	if(del_id!=0)	{		recordStore.deleteRecord(del_id);		temp="成功地删除一条记录";		}	else	{		temp="所指定的记录不在电话薄内";	}}	catch(Exception e)	{	}	ui_form.append(temp);		ui_form.addCommand(quit);	ui_form.addCommand(mainmenu);		ui_form.setCommandListener(this);		display.setCurrent(ui_form);	} void address_add(String address,String phone) { 	String data=address+"?"+phone; 	System.out.println(data); 	try	{ 		byte[] b=data.getBytes(); 		recordStore.addRecord(b,0,b.length); 		ui_form=new Form("添加成功"); 		ui_form.append("成功地添加一条记录"); 		 		ui_form.addCommand(quit); 		ui_form.addCommand(mainmenu); 		 		ui_form.setCommandListener(this); 		 		display.setCurrent(ui_form);	} 	catch(RecordStoreException rse)	{ 		rse.printStackTrace();	} } 	void address_edit(String addressForEdit,String address,String phone) 	{ 		int id=1; 		int edit_id=0; 		String person_name; 		String temp="error"; 		try		{		RecordEnumeration re=			recordStore.enumerateRecords(null,null,false);		    ui_form=new Form("修改");		while(re.hasNextElement())		{			id=re.nextRecordId();			String name1=new String(recordStore.getRecord(id));			try			{				person_name=name1.substring(0,name1.indexOf("?"));			}			catch(Exception ef)			{				person_name="请检查姓名是否正确";			}			if(person_name.equals(addressForEdit))			{				edit_id=id;			}		}		if(edit_id!=0)		{			String data=address+"?"+phone;			byte[] b_data=data.getBytes();			recordStore.setRecord(edit_id,b_data,0,b_data.length);			temp="成功地修改一条记录";			}		else		{			temp="要修改的记录不在电话薄内";		} 	    }		catch(Exception e)		{		e.printStackTrace();		}		ui_form.append(temp); 		 		ui_form.addCommand(quit); 		ui_form.addCommand(mainmenu); 		 		ui_form.setCommandListener(this); 		display.setCurrent(ui_form); 	}    //关闭记录储存    public void close()throws RecordStoreNotOpenException,RecordStoreException   {	recordStore.closeRecordStore();    } }