listmultiplemidlet.java

<j2me 开发精解> 詹建光著 里所有的源码。对J2me的开发相当有帮助

package com.j2medev.sample.chapter3;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class ListMultipleMidlet extends MIDlet implements CommandListener {
    
    private String[] elements = {"Java", "C++", "Pasical", "Basic"};
    private List list = new List("您擅长的语言是", List.MULTIPLE, elements, null);
    private Command ok = new Command("选择", Command.OK,  0);
    private Display display = null;
    
    public ListMultipleMidlet() {
        list.addCommand(ok);
        list.setCommandListener(this);
    }
    public void startApp() {
        if(display==null) {
            display = Display.getDisplay(this);
        }
        display.setCurrent(list);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
    }
    
    public void commandAction(Command c, Displayable d) {
        if(c==ok) {
            boolean[] flags = new boolean[list.size()];
            int num_selected = list.getSelectedFlags(flags);
            StringBuffer sb = new StringBuffer();
            for(int i=0; i<flags.length; i++) {
                if(flags[i])
                    sb = sb.append(list.getString(i) + ", ");
            }
            //去掉最后一个，
            String select = sb.toString();
            System.out.println("您选择了"+select.substring(0, select.length()-2));
        }
    }
}