в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

Admin: 1 версия

2010-05-31T14:22:27Z

1 версия

Новая страница

== 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>

← Предыдущая	Версия 17:43, 31 мая 2010
(нет различий)

Java by API/javax.microedition.rms/RecordStore - История изменений

в 17:43, 31 мая 2010

Admin: 1 версия