Java by API/javax.microedition.rms/RecordStore

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RecordStore: deleteRecordStore(String value) throws RecordStoreException, RecordStoreNotFoundException

   <source lang="java">

import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.TextBox; import javax.microedition.lcdui.TextField; import javax.microedition.midlet.MIDlet; import javax.microedition.rms.RecordStore; public class deleteRecordStoreMIDlet extends MIDlet implements CommandListener { 

 private Command exitCommand;
 private Command confirmCommand;
 private Display display;
 public deleteRecordStoreMIDlet() {
   display = Display.getDisplay(this);
   exitCommand = new Command("exit", Command.EXIT, 1);
   confirmCommand = new Command("confirm", Command.OK, 1);
 }
 public void startApp() {
   TextBox aTextBox = new TextBox("RecordStore", null, 256, TextField.ANY);
   aTextBox.addCommand(exitCommand);
   aTextBox.addCommand(confirmCommand);
   aTextBox.setCommandListener(this);
   display.setCurrent(aTextBox);
 }
 public void pauseApp() {
 }
 public void destroyApp(boolean unconditional) {
 }
 public void commandAction(Command c, Displayable s) {
   if (c.getCommandType() == Command.EXIT) {
     destroyApp(false);
     notifyDestroyed();
   } else {
     try {
       RecordStore.deleteRecordStore("aRS");
     } catch (Exception e) {
     }
   }
 }

} 

 </source>



RecordStore: enumerateRecords(RecordFilter filter, RecordComparator comparator, boolean keepUpdated) throws RecordStoreNotOpenException

   <source lang="java">

import javax.microedition.lcdui.Alert; import javax.microedition.lcdui.AlertType; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Form; import javax.microedition.midlet.MIDlet; import javax.microedition.rms.RecordComparator; import javax.microedition.rms.RecordEnumeration; import javax.microedition.rms.RecordStore; public class J2MESortExample extends MIDlet implements CommandListener { 

 private Display display;
 private Alert alert;
 private Form form = new Form("Mixed RecordEnumeration", null);
 private Command exit = new Command("Exit", Command.SCREEN, 1);
 private Command start = new Command("Start", Command.SCREEN, 1);
 private RecordStore recordstore = null;
 private RecordEnumeration recordEnumeration = null;
 private Comparator comparator = null;
 public J2MESortExample() {
   display = Display.getDisplay(this);
   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);
       String outputData[] = { "M", "B", "A" };
       for (int x = 0; x < 3; x++) {
         byte[] byteOutputData = outputData[x].getBytes();
         recordstore.addRecord(byteOutputData, 0, byteOutputData.length);
       }
       StringBuffer buffer = new StringBuffer();
       Comparator comparator = new Comparator();
       recordEnumeration = recordstore.enumerateRecords(null, comparator, false);
       while (recordEnumeration.hasNextElement()) {
         buffer.append(new String(recordEnumeration.nextRecord()));
         buffer.append("\n");
       }
       alert = new Alert("Reading", buffer.toString(), null, AlertType.WARNING);
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
       recordstore.closeRecordStore();
       if (RecordStore.listRecordStores() != null) {
         RecordStore.deleteRecordStore("myRecordStore");
         recordEnumeration.destroy();
       }
     } catch (Exception error) {
       alert = new Alert("Error Removing", error.toString(), null, AlertType.WARNING);
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
     }
   }
 }

} class Comparator implements RecordComparator { 

 public int compare(byte[] record1, byte[] record2) {
   String string1 = new String(record1), string2 = new String(record2);
   int comparison = string1.rupareTo(string2);
   if (comparison == 0)
     return RecordComparator.EQUIVALENT;
   else if (comparison < 0)
     return RecordComparator.PRECEDES;
   else
     return RecordComparator.FOLLOWS;
 }

} 

 </source>



RecordStore: getNumRecords() throws RecordStoreNotOpenException

   <source lang="java">

import javax.microedition.lcdui.Alert; import javax.microedition.lcdui.AlertType; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Form; import javax.microedition.midlet.MIDlet; import javax.microedition.rms.RecordStore; public class J2MEWriteReadExample extends MIDlet implements CommandListener { 

 private Display display;
 private Alert alert;
 private Form form = new Form("Record");
 private Command exit = new Command("Exit", Command.SCREEN, 1);
 private Command start = new Command("Start", Command.SCREEN, 1);
 private RecordStore recordstore = null;
 public J2MEWriteReadExample() {
   display = Display.getDisplay(this);
   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);
       String outputData = "First Record";
       byte[] byteOutputData = outputData.getBytes();
       recordstore.addRecord(byteOutputData, 0, byteOutputData.length);
       byte[] byteInputData = new byte[1];
       int length = 0;
       for (int x = 1; x <= recordstore.getNumRecords(); x++) {
         if (recordstore.getRecordSize(x) > byteInputData.length) {
           byteInputData = new byte[recordstore.getRecordSize(x)];
         }
         length = recordstore.getRecord(x, byteInputData, 0);
       }
       alert = new Alert("Reading", new String(byteInputData, 0, length), null, AlertType.WARNING);
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
       recordstore.closeRecordStore();
       if (RecordStore.listRecordStores() != null) {
         RecordStore.deleteRecordStore("myRecordStore");
       }
     } catch (Exception error) {
       alert = new Alert("Error Removing", error.toString(), null, AlertType.WARNING);
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
     }
   }
 }

} 

 </source>



RecordStore: getRecord(int arg0, byte[] arg1, int arg2) throws RecordStoreNotOpenException, InvalidRecordIDException, RecordStoreException

   <source lang="java">

import javax.microedition.lcdui.Alert; import javax.microedition.lcdui.AlertType; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Form; import javax.microedition.midlet.MIDlet; import javax.microedition.rms.RecordStore; public class J2MEWriteReadExample extends MIDlet implements CommandListener { 

 private Display display;
 private Alert alert;
 private Form form = new Form("Record");
 private Command exit = new Command("Exit", Command.SCREEN, 1);
 private Command start = new Command("Start", Command.SCREEN, 1);
 private RecordStore recordstore = null;
 public J2MEWriteReadExample() {
   display = Display.getDisplay(this);
   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);
       String outputData = "First Record";
       byte[] byteOutputData = outputData.getBytes();
       recordstore.addRecord(byteOutputData, 0, byteOutputData.length);
       byte[] byteInputData = new byte[1];
       int length = 0;
       for (int x = 1; x <= recordstore.getNumRecords(); x++) {
         if (recordstore.getRecordSize(x) > byteInputData.length) {
           byteInputData = new byte[recordstore.getRecordSize(x)];
         }
         length = recordstore.getRecord(x, byteInputData, 0);
       }
       alert = new Alert("Reading", new String(byteInputData, 0, length), null, AlertType.WARNING);
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
       recordstore.closeRecordStore();
       if (RecordStore.listRecordStores() != null) {
         RecordStore.deleteRecordStore("myRecordStore");
       }
     } catch (Exception error) {
       alert = new Alert("Error Removing", error.toString(), null, AlertType.WARNING);
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
     }
   }
 }

} 

 </source>



RecordStore: getRecordSize(int value) throws RecordStoreNotOpenException, InvalidRecordIDException, RecordStoreException

   <source lang="java">

import javax.microedition.lcdui.Alert; import javax.microedition.lcdui.AlertType; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Form; import javax.microedition.midlet.MIDlet; import javax.microedition.rms.RecordStore; public class J2MEWriteReadExample extends MIDlet implements CommandListener { 

 private Display display;
 private Alert alert;
 private Form form = new Form("Record");
 private Command exit = new Command("Exit", Command.SCREEN, 1);
 private Command start = new Command("Start", Command.SCREEN, 1);
 private RecordStore recordstore = null;
 public J2MEWriteReadExample() {
   display = Display.getDisplay(this);
   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);
       String outputData = "First Record";
       byte[] byteOutputData = outputData.getBytes();
       recordstore.addRecord(byteOutputData, 0, byteOutputData.length);
       byte[] byteInputData = new byte[1];
       int length = 0;
       for (int x = 1; x <= recordstore.getNumRecords(); x++) {
         if (recordstore.getRecordSize(x) > byteInputData.length) {
           byteInputData = new byte[recordstore.getRecordSize(x)];
         }
         length = recordstore.getRecord(x, byteInputData, 0);
       }
       alert = new Alert("Reading", new String(byteInputData, 0, length), null, AlertType.WARNING);
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
       recordstore.closeRecordStore();
       if (RecordStore.listRecordStores() != null) {
         RecordStore.deleteRecordStore("myRecordStore");
       }
     } catch (Exception error) {
       alert = new Alert("Error Removing", error.toString(), null, AlertType.WARNING);
       alert.setTimeout(Alert.FOREVER);
       display.setCurrent(alert);
     }
   }
 }

} 

 </source>



RecordStore: listRecordStores()

   <source lang="java">

import javax.microedition.lcdui.Alert; import javax.microedition.lcdui.AlertType; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Form; import javax.microedition.midlet.MIDlet; import javax.microedition.rms.RecordEnumeration; import javax.microedition.rms.RecordStore; public class J2MERecordStoreExample extends MIDlet implements CommandListener { 

 private Display display;
 private Alert alert;
 private Form form = new Form("Record Store");
 private Command exit = new Command("Exit", Command.SCREEN, 1);
 private Command start = new Command("Start", Command.SCREEN, 1);
 private RecordStore recordstore = null;
 private RecordEnumeration recordenumeration = null;
 public J2MERecordStoreExample() {
   display = Display.getDisplay(this);
   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 {
       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");
       } catch (Exception error) {
         alert = new Alert("Error Removing", error.toString(), null, AlertType.WARNING);
         alert.setTimeout(Alert.FOREVER);
         display.setCurrent(alert);
       }
     }
   }
 }

} 

 </source>



RecordStore: openRecordStore(String value, boolean arg1) throws RecordStoreException, RecordStoreFullException, RecordStoreNotFoundException

   <source lang="java">

import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.TextBox; import javax.microedition.lcdui.TextField; import javax.microedition.midlet.MIDlet; import javax.microedition.rms.RecordStore; import javax.microedition.rms.RecordStoreNotFoundException; public class getRecordMIDlet extends MIDlet implements CommandListener { 

 private Command exitCommand = new Command("exit", Command.STOP, 1);
 private Display display;
 public getRecordMIDlet() {
   display = Display.getDisplay(this);
 }
 public void startApp() {
   TextBox aTextBox = new TextBox("Main", null, 256, TextField.ANY);
   RecordStore rs = null;
   boolean existingOrNot = false;
   existingOrNot = existing("aRS");
   if (existingOrNot) {
     try {
       rs = RecordStore.openRecordStore("aRS", false);
     } catch (Exception e) {
     }
   } else {
     try {
       rs = RecordStore.openRecordStore("aRS", true);
     } catch (Exception e) {
     } finally {
     }
   }
   try {
     String record = "";
     for (int i = 1; i < rs.getNextRecordID(); i++) {
       record = new String(rs.getRecord(i));
     }
     aTextBox.setString(record);
   } catch (Exception e) {
     aTextBox.setString("Failed");
     try {
       rs.closeRecordStore();
       RecordStore.deleteRecordStore("aRS");
     } catch (Exception x) {
     }
   }
   try {
     rs.closeRecordStore();
   } catch (Exception e) {
   }
   aTextBox.addCommand(exitCommand);
   aTextBox.setCommandListener(this);
   display.setCurrent(aTextBox);
 }
 public void pauseApp() {
 }
 public void destroyApp(boolean unconditional) {
 }
 public boolean existing(String recordStoreName) {
   boolean existingOrNot = false;
   RecordStore rs = null;
   if (recordStoreName.length() > 32)
     return false;
   try {
     rs = RecordStore.openRecordStore(recordStoreName, false);
   } catch (RecordStoreNotFoundException e) {
     existingOrNot = false;
   } catch (Exception e) {
   } finally {
     try {
       rs.closeRecordStore();
     } catch (Exception e) {
     }
   }
   return existingOrNot;
 }
 public void commandAction(Command c, Displayable s) {
   destroyApp(false);
   notifyDestroyed();
 }

} 

 </source>
Источник — «http://jexp.ru/index.php?title=Java_by_API/javax.microedition.rms/RecordStore&oldid=882»