J2ME实验报告实验名称：RMS综合实例实验日期：2011/9/28班级：B08513学号：20084051332姓名：刘晓盟一、实验目的综合运用各种界面元素进行高级界面设计。
能够熟练应用RMS API进行J2ME编程。
二、实验环境JDK+WTK+Eclipse+EclipseMe三、实验内容完成“模拟电话本”程序1、欢迎界面：右下角“电话本”进入电话本界面。
左下角“退出”退出程序。
2、电话本界面：List显示所有电话。
右下角“添加”进入添加电话界面，“删除”删除所选电话。
左下角“返回”返回欢迎界面。
3、添加电话界面：输入姓名、电话。
右下角“确定”添加电话并回到电话本界面，左下角“返回”返回电话本界面。
四、源程序与运行结果1、welcome.javapublic class welcome extends MIDlet implements CommandListener {private Display dis;private Form mainform;private Command exit_command;private Command in_command;public welcome() {dis=Display.getDisplay(this);mainform=new Form("主页面");exit_command=new Command("退出",Command.EXIT,1);in_command=new Command("电话薄",Command.SCREEN,2);mainform.addCommand(exit_command);mainform.addCommand(in_command);mainform.setCommandListener(this);}protected void destroyApp(boolean arg0) throws MIDletStateChangeException { }protected void pauseApp() {}protected void startApp() throws MIDletStateChangeException {dis.setCurrent(mainform);}public void backwelcome(){dis.setCurrent(mainform);}public void setaddpho(){addphone addpho=new addphone(this);dis.setCurrent(addpho);}public void setphone(){phonenum ph=new phonenum(this);dis.setCurrent(ph);}public void commandAction(Command c, Displayable d) {if(c==exit_command){try {destroyApp(false);} catch (MIDletStateChangeException e) {e.printStackTrace();}notifyDestroyed();}else{setphone();}}2、Addphone.javapublic class addphone extends Form implements CommandListener { private TextField numtext;private TextField nametext;private Command back_command;private Command enter_command;private welcome midlet;public addphone(welcome midlet) {super("添加电话薄");this.midlet=midlet;numtext=new TextField("请输入电话号码","",11,TextField.NUMERIC);nametext=new TextField("请输入姓名","",10,TextField.ANY);back_command=new Command("返回",Command.BACK,1);enter_command=new Command("确认",Command.OK,2);this.append(nametext);this.append(numtext);this.addCommand(back_command);this.addCommand(enter_command);this.setCommandListener(this);}public void commandAction(Command c, Displayable d) {if(c==back_command){midlet.setphone();}else if(c==enter_command){String name=nametext.getString();String number=numtext.getString();if(name.length()!=0&&number.length()!=0){phonedata phdata=new phonedata(name,number);try {RecordStore rs=RecordStore.openRecordStore("phone", true);byte []b=phdata.encode();rs.addRecord(b, 0, b.length);rs.closeRecordStore();midlet.setphone();} catch (Exception e) {e.printStackTrace();}}else{midlet.setphone();}}}}3、phonedata.javapublic class phonedata {private String name;private String number;public phonedata() {}public phonedata(String name, String number) { = name;this.number = number;}public String getName() {return name;}public void setName(String name) { = name;}public String getNumber() {return number;}public void setNumber(String number) {this.number = number;}public byte[] encode(){byte []b=null;ByteArrayOutputStream bos=new ByteArrayOutputStream();DataOutputStream dos=new DataOutputStream(bos);try {dos.writeUTF(name);dos.writeUTF(number);b=bos.toByteArray();dos.close();bos.close();} catch (IOException e) {e.printStackTrace();}return b;}public void decode(byte []data){ ByteArrayInputStream bis=new ByteArrayInputStream(data);DataInputStream dis=new DataInputStream(bis);try {name=dis.readUTF();number=dis.readUTF();dis.close();bis.close();} catch (IOException e) {e.printStackTrace();}}}4、phonenum.javapublic class phonenum extends List implements CommandListener { private Command back_command;private Command add_command;private Command del_command;private welcome midlet;public phonenum(welcome midlet) {super("电话薄", List.IMPLICIT);this.midlet=midlet;back_command=new Command("返回",Command.BACK,1);add_command=new Command("添加",Command.SCREEN,2);del_command=new Command("删除",Command.SCREEN,3);this.addCommand(add_command);this.addCommand(back_command);this.addCommand(del_command);this.setCommandListener(this);initphone();}public void initphone(){try {RecordStore rs=RecordStore.openRecordStore("phone", true);if(rs.getNumRecords()>0){for(int i=1;i<rs.getNextRecordID();i++){phonedata phdata=new phonedata();try{byte []b=rs.getRecord(i);phdata.decode(rs.getRecord(i));this.append(phdata.getName(), null);}catch(Exception e){}}}rs.closeRecordStore();} catch (Exception e) {e.printStackTrace();}}public void commandAction(Command c, Displayable d) {if(c==back_command){midlet.backwelcome();}else if(c==add_command){midlet.setaddpho();}else if(c==del_command){try {RecordStore rs=RecordStore.openRecordStore("phone", true);for(int i=1;i<rs.getNextRecordID();i++){phonedata phdata=new phonedata();try{phdata.decode(rs.getRecord(i)); if(phdata.getName().compareTo(this.getString(this.getSelectedIndex()))==0){rs.deleteRecord(i);this.delete(this.getSelectedIndex());break;}}catch(Exception e){}}rs.closeRecordStore();} catch (Exception e) {e.printStackTrace();}}} } 2、结果图五、实验总结通过此次试验学到了多个JA VA 文件之间的相互调用，熟悉了记录库的使用。
