Preference save and load : Preference « Development « Java Tutorial

1. Java Tutorial
2. Development
3. Preference

import java.util.Arrays;
import java.util.Iterator;
import java.util.prefs.Preferences;

public class MainClass {
  public static void main(String[] args) throws Exception {
    Preferences prefs = Preferences.userNodeForPackage(MainClass.class);
    prefs.put("key1", "value1");
    prefs.put("key2", "value2");
    prefs.putInt("intValue", 4);
    prefs.putBoolean("booleanValue", true);
    int usageCount = prefs.getInt("intValue", 0);
    usageCount++;
    prefs.putInt("UsageCount", usageCount);
    Iterator it = Arrays.asList(prefs.keys()).iterator();
    while (it.hasNext()) {
      String key = it.next().toString();
      System.out.println(key + ": " + prefs.get(key, null));
    }
    System.out.println(prefs.getInt("booleanValue", 0));
  }
}