A wonderful answer is this CheckBoxList. It implements Telcontar’s answer (though 3 years before :)… I’m using it in Java 1.6 with no problems. I’ve also added an addCheckbox method like this (surely could be shorter, haven’t used Java in a while): public void addCheckbox(JCheckBox checkBox) { ListModel currentList = this.getModel(); JCheckBox[] newList = new … Read more
At the bottom, I have a general solution to replace lines in a file. But first, here is the answer to the specific question at hand. Helper function: public static void replaceSelected(String replaceWith, String type) { try { // input the file content to the StringBuffer “input” BufferedReader file = new BufferedReader(new FileReader(“notes.txt”)); StringBuffer inputBuffer … Read more
Both ItemListener as well as ActionListener, in case of JCheckBox have the same behaviour. However, major difference is ItemListener can be triggered by calling the setSelected(true) on the checkbox. As a coding practice do not register both ItemListener as well as ActionListener with the JCheckBox, in order to avoid inconsistency.
Use the isSelected method. You can also use an ItemListener so you’ll be notified when it’s checked or unchecked.