2015-11-03 12:00:44 -08:00
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// preferences/PreferencesDemo.java
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2015-11-14 16:18:05 -08:00
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// <20>2016 MindView LLC: see Copyright.txt
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2015-11-15 15:51:35 -08:00
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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2015-06-15 17:47:35 -07:00
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import java.util.prefs.*;
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public class PreferencesDemo {
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public static void main(String[] args) throws Exception {
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Preferences prefs = Preferences
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.userNodeForPackage(PreferencesDemo.class);
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prefs.put("Location", "Oz");
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prefs.put("Footwear", "Ruby Slippers");
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prefs.putInt("Companions", 4);
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prefs.putBoolean("Are there witches?", true);
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int usageCount = prefs.getInt("UsageCount", 0);
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usageCount++;
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prefs.putInt("UsageCount", usageCount);
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for(String key : prefs.keys())
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2015-11-03 12:00:44 -08:00
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System.out.println(key + ": "+ prefs.get(key, null));
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2015-06-15 17:47:35 -07:00
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// You must always provide a default value:
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2015-11-03 12:00:44 -08:00
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System.out.println(
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"How many companions does Dorothy have? " +
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2015-06-15 17:47:35 -07:00
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prefs.getInt("Companions", 0));
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}
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2015-09-07 11:44:36 -06:00
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}
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/* Output:
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2015-06-15 17:47:35 -07:00
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Location: Oz
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Footwear: Ruby Slippers
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Companions: 4
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Are there witches?: true
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UsageCount: 33
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How many companions does Dorothy have? 4
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2015-09-07 11:44:36 -06:00
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*/
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