j2me学习笔记【7】——复选框的应用

package mtk;import javax.microedition.lcdui.Choice;import javax.microedition.lcdui.ChoiceGroup;import javax.microedition.lcdui.Command;import javax.microedition.lcdui.CommandListener;import javax.microedition.lcdui.Display;import javax.microedition.lcdui.Displayable;import javax.microedition.lcdui.Form;import javax.microedition.lcdui.StringItem;import javax.microedition.midlet.MIDlet;import javax.microedition.midlet.MIDletStateChangeException;public class CheckBoxes extends MIDlet implements CommandListener {private final static Command CMD_EXIT=new Command("退出",Command.EXIT,1);private Display display;private Command process;private ChoiceGroup movies;private int movieIndex;private Form mainForm;public CheckBoxes() {display=Display.getDisplay(this);movies=new ChoiceGroup("选择你喜欢看的电影",Choice.MULTIPLE);movies.append("让子弹飞", null);movies.append("非诚勿扰", null);movies.append("赵氏孤儿", null);movies.append("大小江湖", null);process=new Command("处理",Command.SCREEN,2);mainForm=new Form("电影");movieIndex=mainForm.append(movies);mainForm.addCommand(CMD_EXIT);mainForm.addCommand(process);mainForm.setCommandListener(this);}protected void destroyApp(boolean arg0){}protected void pauseApp() {}protected void startApp() throws MIDletStateChangeException {display.setCurrent(mainForm);}public void commandAction(Command c, Displayable d) {if(c==process){boolean picks[]=new boolean[movies.size()];StringItem message[]=new StringItem[movies.size()];movies.getSelectedFlags(picks);for(int x=0;x<picks.length;x++){if(picks[x]){message[x]=new StringItem("",movies.getString(x));mainForm.append(message[x]);}}mainForm.delete(movieIndex);mainForm.removeCommand(process);}else if(c==CMD_EXIT){destroyApp(true);notifyDestroyed();}}}