recorddel.java

来自「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!」· Java 代码 · 共 37 行

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

public class RecordDel extends MIDlet{
  public RecordDel(){}
  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..");
      }
    try {
      rs.deleteRecord(2);
      System.out.println("record 2 is deleted.");
    }catch(InvalidRecordIDException e){
    System.out.println("record 2 does not exist ");
  }
  }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){}
}