📄 recordstore.html
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record store.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#getNumRecords()">getNumRecords</A></B>()</CODE>
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Returns the number of records currently in the record store.</TD>
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<CODE> byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#getRecord(int)">getRecord</A></B>(int recordId)</CODE>
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Returns a copy of the data stored in the given record.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#getRecord(int, byte[], int)">getRecord</A></B>(int recordId, byte[] buffer, int offset)</CODE>
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Returns the data stored in the given record.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#getRecordSize(int)">getRecordSize</A></B>(int recordId)</CODE>
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Returns the size (in bytes) of the MIDlet data available in the given record.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#getSize()">getSize</A></B>()</CODE>
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Returns the amount of space, in bytes, that the record store occupies.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#getSizeAvailable()">getSizeAvailable</A></B>()</CODE>
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Returns the amount of additional room (in bytes) available for this record store to grow.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#getVersion()">getVersion</A></B>()</CODE>
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Each time a record store is modified (by <code>addRecord</code>, <code>setRecord</code>, or <code>deleteRecord</code> methods) its <em>version</em> is incremented.</TD>
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<CODE>static <A HREF="../../../java/lang/String.html">String</A>[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#listRecordStores()">listRecordStores</A></B>()</CODE>
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Returns an array of the names of record stores owned by the MIDlet suite.</TD>
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<CODE>static <A HREF="../../../javax/microedition/rms/RecordStore.html">RecordStore</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#openRecordStore(java.lang.String, boolean)">openRecordStore</A></B>(<A HREF="../../../java/lang/String.html">String</A> recordStoreName, boolean createIfNecessary)</CODE>
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Open (and possibly create) a record store associated with the given MIDlet suite.</TD>
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<CODE>static <A HREF="../../../javax/microedition/rms/RecordStore.html">RecordStore</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#openRecordStore(java.lang.String, boolean, int, boolean)">openRecordStore</A></B>(<A HREF="../../../java/lang/String.html">String</A> recordStoreName, boolean createIfNecessary, int authmode, boolean writable)</CODE>
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Open (and possibly create) a record store that can be shared with other MIDlet suites.</TD>
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<CODE>static <A HREF="../../../javax/microedition/rms/RecordStore.html">RecordStore</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#openRecordStore(java.lang.String, java.lang.String, java.lang.String)">openRecordStore</A></B>(<A HREF="../../../java/lang/String.html">String</A> recordStoreName, <A HREF="../../../java/lang/String.html">String</A> vendorName, <A HREF="../../../java/lang/String.html">String</A> suiteName)</CODE>
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Open a record store associated with the named MIDlet suite.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#removeRecordListener(javax.microedition.rms.RecordListener)">removeRecordListener</A></B>(<A HREF="../../../javax/microedition/rms/RecordListener.html">RecordListener</A> listener)</CODE>
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Removes the specified RecordListener.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#setMode(int, boolean)">setMode</A></B>(int authmode, boolean writable)</CODE>
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Changes the access mode for this RecordStore.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/rms/RecordStore.html#setRecord(int, byte[], int, int)">setRecord</A></B>(int recordId, byte[] newData, int offset, int numBytes)</CODE>
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Sets the data in the given record to that passed in.</TD>
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<TD><B>Methods inherited from class java.lang.<A HREF="../../../java/lang/Object.html">Object</A></B></TD>
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<B>Field Detail</B></FONT></TD>
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<A NAME="AUTHMODE_PRIVATE"><!-- --></A><H3>
AUTHMODE_PRIVATE</H3>
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public static final int <B>AUTHMODE_PRIVATE</B></PRE>
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<DD>Authorization to allow access only to the current MIDlet suite. AUTHMODE_PRIVATE has a value of 0.</DL>
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<A NAME="AUTHMODE_ANY"><!-- --></A><H3>
AUTHMODE_ANY</H3>
<PRE>
public static final int <B>AUTHMODE_ANY</B></PRE>
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<DD>Authorization to allow access to any MIDlet suites. AUTHMODE_ANY has a value of 1.</DL>
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<B>Method Detail</B></FONT></TD>
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<A NAME="deleteRecordStore(java.lang.String)"><!-- --></A><H3>
deleteRecordStore</H3>
<PRE>
public static void <B>deleteRecordStore</B>(<A HREF="../../../java/lang/String.html">String</A> recordStoreName) throws <A HREF="../../../javax/microedition/rms/RecordStoreException.html">RecordStoreException</A>, <A HREF="../../../javax/microedition/rms/RecordStoreNotFoundException.html">RecordStoreNotFoundException</A></PRE>
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<DD>Deletes the named record store. MIDlet suites are only allowed to delete their own record stores. If the named record store is open (by a MIDlet in this suite or a MIDlet in a different MIDlet suite) when this method is called, a RecordStoreException will be thrown. If the named record store does not exist a RecordStoreNotFoundException will be thrown. Calling this method does NOT result in recordDeleted calls to any registered listeners of this RecordStore.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>recordStoreName</CODE> - the MIDlet suite unique record store to delete<DT><B>Throws:</B><DD><CODE><A HREF="../../../javax/microedition/rms/RecordStoreException.html">RecordStoreException</A></CODE> - if a record store-related exception occurred<DD><CODE><A HREF="../../../javax/microedition/rms/RecordStoreNotFoundException.html">RecordStoreNotFoundException</A></CODE> - if the record store could not be found</DL>
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<A NAME="openRecordStore(java.lang.String, boolean)"><!-- --></A><H3>
openRecordStore</H3>
<PRE>
public static <A HREF="../../../javax/microedition/rms/RecordStore.html">RecordStore</A> <B>openRecordStore</B>(<A HREF="../../../java/lang/String.html">String</A> recordStoreName, boolean createIfNecessary) throws <A HREF="../../../javax/microedition/rms/RecordStoreException.html">RecordStoreException</A>, <A HREF="../../../javax/microedition/rms/RecordStoreFullException.html">RecordStoreFullException</A>, <A HREF="../../../javax/microedition/rms/RecordStoreNotFoundException.html">RecordStoreNotFoundException</A></PRE>
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<DD>Open (and possibly create) a record store associated with the given MIDlet suite. If this method is called by a MIDlet when the record store is already open by a MIDlet in the MIDlet suite, this method returns a reference to the same RecordStore object.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>recordStoreName</CODE> - the MIDlet suite unique name for the record store, consisting of between one and 32 Unicode characters inclusive.<DD><CODE>createIfNecessary</CODE> - if true, the record store will be created if necessary<DT><B>Returns:</B><DD><code>RecordStore</code> object for the record store<DT><B>Throws:</B><DD><CODE><A HREF="../../../javax/microedition/rms/RecordStoreException.html">RecordStoreException</A></CODE> - if a record store-related exception occurred<DD><CODE><A HREF="../../../javax/microedition/rms/RecordStoreNotFoundException.html">RecordStoreNotFoundException</A></CODE> - if the record store could not be found<DD><CODE><A HREF="../../../javax/microedition/rms/RecordStoreFullException.html">RecordStoreFullException</A></CODE> - if the operation cannot be completed because the record store is full<DD><CODE><A HREF="../../../java/lang/IllegalArgumentException.html">IllegalArgumentException</A></CODE> - if recordStoreName is invalid</DL>
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<A NAME="openRecordStore(java.lang.String, boolean, int, boolean)"><!-- --></A><H3>
openRecordStore</H3>
<PRE>
public static <A HREF="../../../javax/microedition/rms/RecordStore.html">RecordStore</A> <B>openRecordStore</B>(<A HREF="../../../java/lang/String.html">String</A> recordStoreName, boolean createIfNecessary, int authmode, boolean writable) throws <A HREF="../../../javax/microedition/rms/RecordStoreException.html">RecordStoreException</A>, <A HREF="../../../javax/microedition/rms/RecordStoreFullException.html">RecordStoreFullException</A>, <A HREF="../../../javax/microedition/rms/RecordStoreNotFoundException.html">RecordStoreNotFoundException</A></PRE>
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<DD>Open (and possibly create) a record store that can be shared with other MIDlet suites. The RecordStore is owned by the current MIDlet suite. The authorization mode is set when the record store is created, as follows: <ul> <li><code>AUTHMODE_PRIVATE</code> - Only allows the MIDlet suite that created the RecordStore to access it. This case behaves identically to <code>openRecordStore(recordStoreName, createIfNecessary)</code>.</li> <li><code>AUTHMODE_ANY</code> - Allows any MIDlet to access the RecordStore. Note that this makes your recordStore accessible by any other MIDlet on the device. This could have privacy and security issues depending on the data being shared. Please use carefully.</li> </ul> <p>The owning MIDlet suite may always access the RecordStore and always has access to write and update the store.</p>⌨️ 快捷键说明
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