How to check the status of checkbox in java GUI?

Question

I have around 200 hundred checkboxes in a Java GUI. Now I want to have the list of all checkboxes that have been checked by the user.

I can do it in one way like thi

Answer 1

You really should have put these in an array or Collection so that you can just loop over them. eg.

List allCheckBoxes = new ArrayList()
allCheckboxes.add(new JCheckBox());

etc.

If you have all these checkboxes declared as members then there's no excuse to just put them in a list instead.

In the meantime you could use a dodgy cast in a for loop (if all the checkboxes are on the same panel)

boolean allSelected = true;
for(Component component : myPanel.getComponents()) {
  if(component instanceof JCheckBox) {
    allSelected &= ((JCheckBox)component).isSelected();
  }
}

I'd recommend reading about Java arrays and collections before continuing

http://java.sun.com/docs/books/tutorial/java/nutsandbolts/arrays.html

http://java.sun.com/docs/books/tutorial/collections/index.html