Java Language Preferences Exporting preferences
Example
Preferences nodes can be exported into a XML document representing that node. The resulting XML tree can be imported again. The resulting XML document will remember whether it was exported from the user or system Preferences.
To export a single node, but not its child nodes:
Java SE 7
try (OutputStream os = ...) {
preferences.exportNode(os);
} catch (IOException ioe) {
// Exception whilst writing data to the OutputStream
ioe.printStackTrace();
} catch (BackingStoreException bse) {
// Exception whilst reading from the backing preferences store
bse.printStackTrace();
}
Java SE 7
OutputStream os = null;
try {
os = ...;
preferences.exportSubtree(os);
} catch (IOException ioe) {
// Exception whilst writing data to the OutputStream
ioe.printStackTrace();
} catch (BackingStoreException bse) {
// Exception whilst reading from the backing preferences store
bse.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException ignored) {}
}
}
To export a single node with its child nodes:
Java SE 7
try (OutputStream os = ...) {
preferences.exportNode(os);
} catch (IOException ioe) {
// Exception whilst writing data to the OutputStream
ioe.printStackTrace();
} catch (BackingStoreException bse) {
// Exception whilst reading from the backing preferences store
bse.printStackTrace();
}
Java SE 7
OutputStream os = null;
try {
os = ...;
preferences.exportSubtree(os);
} catch (IOException ioe) {
// Exception whilst writing data to the OutputStream
ioe.printStackTrace();
} catch (BackingStoreException bse) {
// Exception whilst reading from the backing preferences store
bse.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException ignored) {}
}
}
