Use The Registry to Store Information

With JDK1.4, the Preferences can use the Windows registry :

import java.util.prefs.Preferences; public class UsingReg { public static final String REALKEY= "com.rgagnon.foo"; public static void main(String[] args) { new UsingReg().doit(); } public void doit() { // write into HKCU\Software\Javasoft\Prefs\com.rgagnon.foo Preferences p = Preferences.userRoot(); p.put(REALKEY, "bar"); // read back from HKEY_CURRENT_USER System.out.println(p); System.out.println(p.get(REALKEY, "HKCU houston we have a problem")); // write into HKLM\Software\Javasoft\Prefs\com.rgagnon.foo p = Preferences.systemRoot(); p.put(REALKEY, "barbar"); // read back from HKEY_LOCAL_MACHINE System.out.println(p); System.out.println(p.get(REALKEY, "HKLM houston we have a problem")); } }