Using the Java.util.prefs package to operate the Windows registry

Using the Java.util.prefs package to operate the Windows registry

Java Operations Windows Registry, primary API

Main interface

Interface	Description
Nodechangelistener	The listener used to receive the preference node Change event.
Preferencechangelistener	The listener used to receive the preference node Change event.
Preferencesfactory	The factory object that generates the Preferences object.

Main class

class	Description
Abstractpreferences	This class provides a backbone implementation of the preferences class, which greatly simplifies the task of implementing this class.
Nodechangeevent	An event emitted by the preferences node that indicates that the node's child nodes have been added or removed.
Preferencechangeevent	An event emitted by the preference node that indicates that the first option has been added or removed, or that the value of the preference item has been changed.
Preferences	The node in the hierarchy collection of the preference data.

Major exceptions

Exception	Description
Backingstoreexception	Throwing this exception indicates that the preferences operation cannot be completed because of an internal storage failure or inability to contact internal storage. Listener.
Invalidpreferencesformatexception	Throwing this exception indicates that, according to the preferences specification, the input does not conform to the correct XML document type of the preferences collection, so the operation cannot be completed.

Sample code

ImportJava.util.prefs.BackingStoreException;ImportJava.util.prefs.Preferences; Public  class Test {     Public Static void Main(string[] args)        {Preferences pre=preferences.systemnodeforpackage (test.class); Pre.put ("UserName","******"); Pre.putint ("Age", -);Try{Pre.flush (); }Catch(Backingstoreexception e)        {E.printstacktrace ();        } Preferences Now=preferences.systemnodeforpackage (Test.class); System.out.println (Now.get ("UserName","is empty")); System.out.println (Now.getint ("Age",0)); }}

Other

if Systemnodeforpackage is selected, it is saved in [Hkey_local_machine\software\javasoft\prefs]

If Usernodeforpackage is selected, it is saved in [Hkey_current_user\software\javasoft\prefs]

There are a number of limitations if you want to add a program to your registry's autorun keys. Or do you want to use Java to call batch processing.

Using the Java.util.prefs package to operate the Windows registry