30 lines
936 B
Java
30 lines
936 B
Java
//: io/PreferencesDemo.java
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import java.util.prefs.*;
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import static net.mindview.util.Print.*;
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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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print(key + ": "+ prefs.get(key, null));
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// You must always provide a default value:
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print("How many companions does Dorothy have? " +
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prefs.getInt("Companions", 0));
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}
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} /* Output: (Sample)
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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: 53
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How many companions does Dorothy have? 4
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*///:~
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