Java Tutorial/J2ME/RecordListener

implements RecordListener

import javax.microedition.midlet.MIDlet;
import javax.microedition.rms.RecordComparator;
import javax.microedition.rms.RecordFilter;
import javax.microedition.rms.RecordListener;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreNotOpenException;
class TestDB implements RecordListener {
  public void recordAdded(RecordStore rs, int id) {
    try {
      System.out.println(rs.getName() + " added record " + id);
    } catch (RecordStoreNotOpenException e) {
    }
  }
  public void recordChanged(RecordStore rs, int id) {
    try {
      System.out.println(rs.getName() + " changed record " + id);
    } catch (RecordStoreNotOpenException e) {
    }
  }
  public void recordDeleted(RecordStore rs, int id) {
    try {
      System.out.println(rs.getName() + " removed record " + id);
    } catch (RecordStoreNotOpenException e) {
    }
  }
}
class TestFilter implements RecordFilter {
  public boolean matches(byte[] rec) {
    String r = new String(rec);
    return ((r.charAt(0) == "a") || (r.charAt(0) == "A"));
  }
}
class TestComparator implements RecordComparator {
  public int compare(byte[] rec1, byte[] rec2) {
    String r1 = new String(rec1);
    String r2 = new String(rec2);
    if (r1.rupareTo(r2) > 0)
      return (RecordComparator.FOLLOWS);
    else if (r1.rupareTo(r2) < 0)
      return (RecordComparator.PRECEDES);
    else
      return (RecordComparator.EQUIVALENT);
  }
}
public class J2METestDBTest extends MIDlet {
  public void startApp() {
    try {
      RecordStore anRMS = RecordStore.openRecordStore("TestRMS", true);
      anRMS.addRecordListener(new TestDB());
      String test = "This is a test";
      byte[] b = test.getBytes();
      anRMS.addRecord(b, 8, 6);
      anRMS.addRecord(b, 5, 2);
      RecordComparator rc = new TestComparator();
      byte[] r1 = anRMS.getRecord(1);
      byte[] r2 = anRMS.getRecord(2);
      System.out.println(rc.rupare(r1, r2));
    } catch (Exception e) {
    }
  }
  public void pauseApp() {
  }
  public void destroyApp(boolean unconditional) {
  }
}