3
相同的代碼在兩個J2ME & NetBeans的下面的代碼運行：獲得不同的輸出，同時運行在J2ME＆的NetBeans
該代碼可用於記錄濾波（查詢的記錄）。
問題是，我們在j2me中運行此代碼時，它從頭開始執行搜索，而在NetBeans中則是從反向搜索。
import javax.microedition.rms.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;
import javax.microedition.rms.RecordFilter;
public class SearchExample extends MIDlet implements CommandListener
{
private Display display;
private Alert alert;
private Form form;
private Command exit;
private Command start;
private RecordStore recordstore = null;
private RecordEnumeration recordEnumeration = null;
private Filter filter = null;
public SearchExample()
{
display = Display.getDisplay(this);
exit = new Command("Exit", Command.SCREEN, 1);
start = new Command("Start", Command.SCREEN, 1);
form = new Form("Mixed RecordEnumeration", null);
form.addCommand(exit);
form.addCommand(start);
form.setCommandListener(this);
}
public void startApp()
{
display.setCurrent(form);
}
public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
}
public void commandAction(Command command, Displayable displayable)
{
if (command == exit)
{
destroyApp(true);
notifyDestroyed();
}
else if (command == start)
{
try
{
recordstore = RecordStore.openRecordStore("myRecordStore", true);
}
catch (Exception error)
{
alert = new Alert("Error Creating",error.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
try
{
String outputData[] = {"Mary", "Adam","dancebob","bobby","bob1"};
for (int x = 0 ; x < outputData.length; x++)
{
byte[] byteOutputData = outputData[x].getBytes();
recordstore.addRecord(byteOutputData, 0,byteOutputData.length);
}
}
catch (Exception error)
{
alert = new Alert("Error Writing",error.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
try
{
filter = new Filter("Bob");
StringBuffer sbuf=new StringBuffer();
recordEnumeration = recordstore.enumerateRecords(filter, null, false);
if (recordEnumeration.numRecords() > 0)
{
for(int i=0;i<recordEnumeration.numRecords();i++){
String string = new String(recordEnumeration.nextRecord());
sbuf.append(string+"\n");
}
alert = new Alert("Reading", sbuf.toString(),null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
}
catch (Exception error)
{
alert = new Alert("Error Reading",error.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
try
{
recordstore.closeRecordStore();
}
catch (Exception error)
{
alert = new Alert("Error Closing",error.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
if (RecordStore.listRecordStores() != null)
{
try
{
RecordStore.deleteRecordStore("myRecordStore");
recordEnumeration.destroy();
filter.filterClose();
}
catch (Exception error)
{
alert = new Alert("Error Removing",error.toString(), null, AlertType.WARNING);
alert.setTimeout(Alert.FOREVER);
display.setCurrent(alert);
}
}
}
}
}
class Filter implements RecordFilter
{
private String search = null;
private ByteArrayInputStream inputstream = null;
private DataInputStream datainputstream = null;
public Filter(String search)
{
this.search = search.toLowerCase();
}
public boolean matches(byte[] suspect)
{
String string = new String(suspect).toLowerCase();
if (string!= null && string.indexOf(search) != -1)
return true;
else
return false;
}
public void filterClose()
{
try
{
if (inputstream != null)
{
inputstream.close();
}
if (datainputstream != null)
{
datainputstream.close();
}
}
catch (Exception error)
{
}
}
}