midlet2.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.RecordListener;
import javax.microedition.rms.RecordStore;

public class MIDlet2 extends MIDlet{

	protected void startApp() throws MIDletStateChangeException {
		RecordStore rs = null;
		try{
			rs = RecordStore.openRecordStore("RS1", true);		
			rs.addRecordListener(new RS1Listener());
			
			rs.addRecord("中国人".getBytes(), 0, 6);
			rs.setRecord(1,"中国".getBytes(), 0, 4);
			
		}catch(Exception ex){
			ex.printStackTrace();
		}
		finally{
			try{
				rs.closeRecordStore();
			}catch(Exception ex){}
		}

	}
	



	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO Auto-generated method stub

	}

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

	}


	class RS1Listener  implements RecordListener{
		/************************事件响应************************************/
		public void recordAdded(RecordStore recordStore, int recordId) {
			try{
				System.out.println(recordStore.getName() + "添加记录" + recordId);
			}catch(Exception ex){}		
		}
	    public void recordChanged(RecordStore recordStore, int recordId) {
	    	try{
				System.out.println(recordStore.getName() + "改变记录" + recordId);
			}catch(Exception ex){}		
	    }
	    public void recordDeleted(RecordStore recordStore, int recordId) {
	    	try{
				System.out.println(recordStore.getName() + "删除记录" + recordId);
			}catch(Exception ex){}		
	    }
	}
}