chkSelectAll.setSelected(lisBoardsSelected.getSelectedIndexes().length == lisBoardsSelected.getItemCount());
boolean newVal = lisBoardsSelected.getSelectedIndices().length == lisBoardsSelected.getModel().getSize(); if (chkSelectAll.isSelected() != newVal) chkSelectAll.setSelected(newVal);
    private void refreshSelectAllCheck() {        chkSelectAll.setSelected(lisBoardsSelected.getSelectedIndexes().length == lisBoardsSelected.getItemCount());    }