recordupdate.java

rms常用操作例子,可通过这些例子修改成你想要的代码,绝对有用!

import javax.microedition.midlet.*;
import javax.microedition.rms.*;

public class RecordUpdate extends MIDlet {
  public RecordUpdate(){}
  public void startApp()throws MIDletStateChangeException{
    RecordStore rs=null;
    try{
      rs =RecordStore.openRecordStore("file1 ",true);
      byte data []=new byte [4];
      for(int j=0;j<2;j++){
        int i=rs.getNextRecordID();
        data [0 ] = (byte)((i >>24)&0xff);
        data [1 ] = (byte)((i >>16)&0xff);
        data [2 ] = (byte)((i >>8)&0xff);
        data [3 ] = (byte)(i &0xff);
        System.out.println("record "+rs.addRecord(data,0,4)+" is added..");
      }
     }catch(Exception e){}
     finally{
     //close the Record Store
     try {
       rs.closeRecordStore();
     }catch (Exception e){}
   }
   destroyApp(true);
   notifyDestroyed();
 }
  public void pauseApp(){}
  public void destroyApp(boolean unconditional){}
}