[J2ME] 获得MIDlet信息

import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;


public class main extends MIDlet {
    
    private Display ds;
    private Form fr;
    private TextField tf;
    private String proString="";
    
    public main() {
        // TODO Auto-generated constructor stub
        proString=proString+"厂商: "+getAppProperty("MIDlet-Vendor")+"
";
        proString=proString+"描述: "+getAppProperty("MIDlet-Description")+"
";
        proString=proString+"自定义版本: "+getAppProperty("jadFile-Version")+"
";
        proString=proString+"数据空间: "+getAppProperty("MIDlet-Data-Size");
        fr=new Form("MIDlet Properties");
        tf=new TextField("属性:",proString,500,TextField.ANY);
        fr.append(tf);
    }

    protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
        // TODO Auto-generated method stub

    }

    protected void pauseApp() {
        // TODO Auto-generated method stub

    }

    protected void startApp() throws MIDletStateChangeException {
        // TODO Auto-generated method stub
        ds=Display.getDisplay(this);
        ds.setCurrent(fr);
    }

}