Here you can find the source of getAltNode(final String name)
public static Preferences getAltNode(final String name)
//package com.java2s; //License from project: Open Source License import java.util.prefs.Preferences; public class Main { public static Preferences getAltNode(final String name) { return Preferences.userRoot().node("/com/affymetrix/" + name); }/*from ww w. j a v a2 s .co m*/ }