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The Java Developers Almanac 1.4Order this book from Amazon. |
e778. Adding and Removing an Item in a JList ComponentThe default model for a list does not allow the addition and removal of items. The list must be created with aDefaultListModel .
// Create a list that allows adds and removes DefaultListModel model = new DefaultListModel(); JList list = new JList(model); // Initialize the list with items String[] items = {"A", "B", "C", "D"}; for (int i=0; i<items.length; i++) { model.add(i, items[i]); } // Append an item int pos = list.getModel().getSize(); model.add(pos, "E"); // Insert an item at the beginning pos = 0; model.add(pos, "a");This method replaces an item: // Replace the 2nd item pos = 1; model.set(pos, "b");These methods are used to remove items: // Remove the first item pos = 0; model.remove(pos); // Remove the last item pos = model.getSize()-1; if (pos >= 0) { model.remove(pos); } // Remove all items model.clear();
e775. Setting the Dimensions of an Item in a JList Component e776. Setting a Tool Tip for an Item in a JList Component e777. Getting the Items in a JList Component e779. Getting the Selected Items in a JList Component e780. Setting the Selected Items in a JList Component e781. Setting the Selection Mode of a JList Component e782. Arranging Items in a JList Component e783. Detecting Double and Triple Clicks on an Item in a JList Component e784. Listening for Changes to the Selection in a JList Component e785. Listening for Changes to the Items in a JList Component © 2002 Addison-Wesley. |