button-group

This small library provides a subclass of javax.swing.ButtonGroup which adds the following functionality:

• Type-safety via generics.
• Selects first added button by default.
• Selection change listeners (see KButtonGroupListener).
• Allows to assign button mnemonics.
• Access to the buttons by index.
• Implements Iterable to iterate over buttons in the group.

Example:

import javax.swing.JRadioButton;

import io.github.parubok.button.group.KButtonGroup;
import io.github.parubok.button.group.KButtonGroupListener;
import io.github.parubok.button.group.KButtonGroupEvent;

var radio1 = new JRadioButton("Option A");
var radio2 = new JRadioButton("Option B");
var radio3 = new JRadioButton("Option C");
var group = new KButtonGroup<>(radio1, radio2, radio3);
group.addListener(new KButtonGroupListener<JRadioButton>() {
            @Override
            public void onSelectionChange(KButtonGroupEvent<JRadioButton> e) {
                System.out.println("Button selected: " + e.getSelectedButton());
                System.out.println("Button unselected: " + e.getPrevSelectedButton());
            }
        });

This library is packaged as a Java 9 module io.github.parubok.button.group (with a single dependency on a system module java.desktop).

This project has no external dependencies (except JUnit 5, for testing).

Requires Java 11 or later.

Maven

Add this snippet to the pom.xml dependencies section:

<dependency>
    <groupId>io.github.parubok</groupId>
    <artifactId>button-group</artifactId>
    <version>1.7</version>
</dependency>