J2ME中使用TextField实现表单界面代码实战 收藏 本例主要借助Form和TextBox显示。 代码如下： /** * @作者 Jcuckoo * @创建日期 2008-11-18 * @版本 V 1.0 */public class TextFieldMIDlet extends MIDlet implements CommandListener{ //声名 private Display display;  private Form myform; private TextField userName; private TextField userPwd; private TextField email; private TextField number; private TextField value; private TextField telnum;  private TextBox showMessage; private Command saveCommand; private Command backCommand; private Command exitCommand;  public TextFieldMIDlet() {  display=Display.getDisplay(this);  myform=new Form("TextField实例测试");    userName=new TextField("姓名：","",20,TextField.ANY);  userPwd=new TextField("密码：","",20,TextField.PASSWORD);  email=new TextField("Email：","",20,TextField.EMAILADDR);  number=new TextField("数字字符串：","",20,TextField.NUMERIC);  value=new TextField("数值：","",20,TextField.DECIMAL);  telnum=new TextField("电话号码：","",20,TextField.PHONENUMBER);    saveCommand=new Command("保存",Command.SCREEN,1);  backCommand=new Command("返回",Command.BACK,1);  exitCommand=new Command("退出",Command.EXIT,1);    myform.append(userName);  myform.append(userPwd);  myform.append(email);  myform.append(number);  myform.append(value);  myform.append(telnum);  myform.addCommand(saveCommand);  myform.addCommand(exitCommand);  myform.setCommandListener(this);    showMessage=new TextBox("你输入的信息为：","",200,TextField.ANY);  showMessage.addCommand(backCommand);  showMessage.addCommand(exitCommand);  showMessage.setCommandListener(this); } protected void destroyApp(boolean arg0){ } protected void pauseApp() { } protected void startApp() throws MIDletStateChangeException {  display.setCurrent(myform); } public void commandAction(Command c, Displayable d) {  if(c==saveCommand){   //方法一：使用String测试   /*   String tmp="";   tmp+=userName.getLabel()+userName.getString()+"\n";   tmp+=userPwd.getLabel()+userPwd.getString()+"\n";   tmp+=email.getLabel()+email.getString()+"\n";   tmp+=number.getLabel()+number.getString()+"\n";   tmp+=value.getLabel()+value.getString()+"\n";   tmp+=telnum.getLabel()+telnum.getString()+"\n";   showMessage.setString(tmp);   */      //方法二：采用StringBuffer来实现，以提供资源利用率（建议使用此方法）。   StringBuffer bf=new StringBuffer();   bf.append(userName.getLabel());   bf.append(userName.getString());   bf.append("\n");   bf.append(userPwd.getLabel());   bf.append(userPwd.getString());   bf.append("\n");   bf.append(email.getLabel());   bf.append(email.getString());   bf.append("\n");   bf.append(number.getLabel());   bf.append(number.getString());   bf.append("\n");   bf.append(value.getLabel());   bf.append(value.getString());   bf.append("\n");   bf.append(telnum.getLabel());   bf.append(telnum.getString());   bf.append("\n");   showMessage.setString(new String(bf));      display.setCurrent(showMessage);   }  if(c==backCommand){   //返回清空表单   /*   userName.setString("");   userPwd.setString("");   email.setString("");   number.setString("");   value.setString("");   telnum.setString("");   */   display.setCurrent(myform);  }  if(c==exitCommand){   destroyApp(false);   notifyDestroyed();  } }}   本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/guoquanyou/archive/2008/11/18/3324016.aspx

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