midlet3.java

这是郭克华老师的J2ME视频的源代码

package prj16_1;

import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordFilter;
import javax.microedition.rms.RecordStore;

public class MIDlet3 extends MIDlet implements RecordFilter{

	protected void startApp() throws MIDletStateChangeException {
		RecordStore rs = null;
		try{
			rs = RecordStore.openRecordStore("RS1", true);
			rs.addRecord("张三".getBytes(), 0, 4);
			rs.addRecord("李四".getBytes(), 0, 4);
			rs.addRecord("王武".getBytes(), 0, 4);
			rs.addRecord("王强".getBytes(), 0, 4);
			rs.addRecord("黄华".getBytes(), 0, 4);
			
			RecordEnumeration re = rs.enumerateRecords(this, null, false);
			while(re.hasNextElement()){
				System.out.println(new String(re.nextRecord()));
			}
			
			
			
		}catch(Exception ex){
			ex.printStackTrace();
		}
		finally{
			try{
				rs.closeRecordStore();
			}catch(Exception ex){}
		}

	}
	public boolean matches(byte[] candidate){
		String  str = new String(candidate);
		if(str.startsWith("王")){
			return true;
		}
		return false;
	}
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub

	}

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

	}



}