How do I save preference user settings in Java?

java swing jframe jbutton
js0823 picture js0823 · Oct 25, 2010 · Viewed 46.4k times · Source

For example, I have a window with a preference button. I want to make it so that when user press the preference button and checks his/her appropriate options and press ok, it saves the preference, then when user presses run on the main window, it runs accordingly to preference the user changed on the preference window.

Thank you in advance.

Answer

Peter Knego picture Peter Knego · Oct 25, 2010

You can use java.util.prefs package. A simple example:

// Retrieve the user preference node for the package com.mycompany
Preferences prefs = Preferences.userNodeForPackage(com.mycompany.MyClass.class);

// Preference key name
final String PREF_NAME = "name_of_preference";

// Set the value of the preference
String newValue = "a string";
prefs.put(PREF_NAME, newValue);

// Get the value of the preference;
// default value is returned if the preference does not exist
String defaultValue = "default string";
String propertyValue = prefs.get(PREF_NAME, defaultValue); // "a string"

There are many more examples at java2s.com.

Related questions

How to place a JButton at a desired location in a JFrame using Java

I want to put a Jbutton on a particular coordinate in a JFrame. I put setBounds for the JPanel (which I placed on the JFrame) and also setBounds for the JButton. However, they dont seem to function as expected. My …

Read More
How to open a new window by clicking a button

As a part of my program, I need to have a button that when the user click on it, it opens a new window. Well I guess I should have a class that make the frame and call it by …

Read More
Button ActionListener

Ok, so I made a simple program that adds the value to counter each time a button is clicked. Now, I would like to add "Auto" button feature to increase the value of the counter when the "Auto" button is …

Read More