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18 paź 2012 · If variable reach four, disable all of checkboxes with setEnabled(false) except those which are checked. When you'll decrease your variable from 4 to 3, set them to enabled. This is good example about ChangeListener: http://www.java2s.com/Code/Java/Event/CheckBoxItemListener.htm
25 kwi 2013 · You can easily have an int variable that stores how many checkboxes are currently checked... Then any time onCheckedChanged() is called, you check that variable and if it would already be a third checkbox to be checked, you just set it to unchecked again...
23 paź 2023 · The Java ItemListener user interface in Java's Abstract Window Toolkit (AWT) is a crucial component for managing user interactions with elements like checkboxes and option lists. In this article, we wish to search how the ItemListener interface is old in AWT to respond to exploiter input.
First, this section explains the basic button API that AbstractButton defines — and thus all Swing buttons have in common. Next, it describes the small amount of API that JButton adds to AbstractButton. After that, this section shows you how to use specialized API to implement check boxes and radio buttons.
5 lip 2019 · This article describes how to use JCheckBox component in Swing applications, including code examples, common practices and a demo program. Table of content: Creating a new JCheckBox object. Adding the check box to a container. Setting and getting selected state. Adding event listeners.
public Checkbox(String label, CheckboxGroup group, boolean state) throws HeadlessException. Creates a check box with the specified label, in the specified check box group, and set to the specified state. Parameters: label - a string label for this check box, or null for no label.
Java AWT Checkbox. The Checkbox class is used to create a checkbox. It is used to turn an option on (true) or off (false). Clicking on a Checkbox changes its state from "on" to "off" or from "off" to "on".
