Java Preferences

Java中的Preferences的基本使用方法：

import java.util.prefs.Preferences;

public class PreferencesDemo {
public static 
void main(String[] args) throws Exception {
Preferences prefs = Preferences.userNodeForPackage(PreferencesDemo.class);
prefs.put("Location", "Oz");
prefs.put("Footwear", "Ruby Slippers");
prefs.putInt("Companions", 4);
prefs.putBoolean("Are there witches?", 
true);
int usageCount = prefs.getInt("UsageCount",
0);
usageCount++;
prefs.putInt("UsageCount", usageCount);
for (String key : prefs.keys()) {
System.out.println(key + ": " + prefs.get(key, 
null));
}
// You must always provide a default value:
System.out.println("How many companions does Dorothy have? " + prefs.getInt("Companions",
0));
}
}

import java.util.prefs.Preferences;

public class PreferencesDemo {
	public static void main(String[] args) throws Exception {
		Preferences prefs = Preferences.userNodeForPackage(PreferencesDemo.class);
		prefs.put("Location", "Oz");
		prefs.put("Footwear", "Ruby Slippers");
		prefs.putInt("Companions", 4);
		prefs.putBoolean("Are there witches?", true);
		int usageCount = prefs.getInt("UsageCount", 0);
		usageCount++;
		prefs.putInt("UsageCount", usageCount);
		for (String key : prefs.keys()) {
			System.out.println(key + ": " + prefs.get(key, null));
		}
		// You must always provide a default value:
		System.out.println("How many companions does Dorothy have? " + prefs.getInt("Companions", 0));
	}
}

代码来自：《Thinking in Java》

详细使用，请参考对应的JDK文档！=^_^=