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blog名称:小雨
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 [知识积累]j2me rms |
小雨 发表于 2007/3/31 16:57:09 |
import javax.microedition.rms.*;import javax.microedition.lcdui.*;import javax.microedition.midlet.*;import javax.microedition.io.*;import java.util.Enumeration;import java.io.*;public class testRms extends MIDlet implements CommandListener{ List list,choose; Command back; Display display ; RecordStore rs=null; public void startApp() { display=Display.getDisplay(this); back=new Command("back",Command.BACK,1); choose=new List("show",List.IMPLICIT); list=new List("select list",List.IMPLICIT); list.append("add",null); list.append("view",null); list.append("delete",null); list.setCommandListener(this); choose.addCommand(back); choose.setCommandListener(this); display.setCurrent(list); } public void pauseApp() { } public void destroyApp(boolean uncondition){ } public void commandAction(Command c,Displayable d) { if(c.getCommandType()==Command.BACK) display.setCurrent(list); if(list.getSelectedIndex()==0) { try { rs=RecordStore.openRecordStore("sampledata",true); byte[] bytestr="hello,rms".getBytes(); int id=rs.addRecord(bytestr,0,bytestr.length); System.out.println(id); }catch(Exception ex){ } } if(list.getSelectedIndex()==1) { byte[] bytestr=null; try { if (rs==null) rs=RecordStore.openRecordStore("sampledata",false); RecordEnumeration re=rs.enumerateRecords(null,null,false); while(re.hasNextElement()) { String theList=new String(re.nextRecord()); choose.append(theList,null); } } catch(Exception e) {} display.setCurrent(choose); } if(list.getSelectedIndex()==2) { try { if (rs==null) rs=RecordStore.openRecordStore("sampledata",false); RecordEnumeration re=rs.enumerateRecords(null,null,true); while(re.hasNextElement()) { int id=re.nextRecordId(); rs.deleteRecord(id); System.out.println(id); } } catch(Exception e) { } } }}
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