Java中使用Preferences 的 API设置用户偏好

import java.util.prefs.Preferences; 
public class PreferenceTest { 
private Preferences prefs; 
public void setPreference() { 
// This will define a node in which the preferences can be stored 
prefs = Preferences.userRoot().node(this.getClass().getName()); 
String ID1 = "Test1"; 
String ID2 = "Test2"; 
String ID3 = "Test3"; 
// First we will get the values 
// Define a boolean value 
System.out.println(prefs.getBoolean(ID1, true)); 
// Define a string with default "Hello World 
System.out.println(prefs.get(ID2, "Hello World")); 
// Define a integer with default 50 
System.out.println(prefs.getInt(ID3, 50)); 
// Now set the values 
prefs.putBoolean(ID1, false); 
prefs.put(ID2, "Hello Europa"); 
prefs.putInt(ID3, 45); 
// Delete the preference settings for the first value 
prefs.remove(ID1); 
} 
public static void main(String[] args) { 
PreferenceTest test = new PreferenceTest(); 
test.setPreference(); 
} 
}