What is the easiest way to make configuration files in Java?

Question

Obviously, I want to avoid hard coding paths, etc. in my application, and as a result, I would like to create a settings file that will store simple things like strings, etc. What is the easiest way to do this? I was thinking about how Cocoa uses object persistence, but I cannot find anything equivalent.

Answer 1

You can use properties files that are managed using java.util.Properties .

Answer 2

Based on what you said the simplest:

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    // Save Settings
    Properties saveProps = new Properties();
    saveProps.setProperty("path1", "/somethingpath1");
    saveProps.setProperty("path2", "/somethingpath2");
    saveProps.storeToXML(new FileOutputStream("settings.xml"), "");

    // Load Settings
    Properties loadProps = new Properties();
    loadProps.loadFromXML(new FileInputStream("settings.xml"));
    String path1 = loadProps.getProperty("path1");
    String path2 = loadProps.getProperty("path2");

Answer 3

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// Class to wrap some settings
public class AnimationSettings {
    private static final String VELOCITY_KEY = "velocity";
    private static final double VELOCITY_DEFAULT = 5.0;

    public static double getVelocity() {
        return getPrefs().getDouble(VELOCITY_KEY, VELOCITY_DEFAULT);
    }

    public static void setVelocity(int velocity) {
         getPrefs().putDouble(VELOCITY_KEY, velocity);
    }

    public static void sync() {
         getPrefs().sync();
    }

    private static Preferences getPrefs() {
        if (preferences_ == null) {
           preferences_ = Preferences.userNodeForPackage(AnimationSettings.class);
        }
        return preferences_;
    }

    private static Preferences preferences_ = null;
};

// Elsewhere in the application:
//...
double velocity = AnimationSettings.getVelocity();
// ...

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Answer 4

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Answer 5

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Answer 6

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Answer 7

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