How to add element to existing JList

Question

Part of my code

 ArrayList<Item> i = g.getItems(); 
 Vector itemsVector = new Vector(i); 
 JList items = new JList(iemsVector); 

Later in the code I create new object which I want to add to JList. How can I do that?

Answer 1

Populate the JList with a DefaultListModel, not a vector, and have the model visible in the class. Then simply call addElement on the list model to add items to it.

Answer 2

Well you can not use directly that Array but use this this will might help you for the same.

 DefaultListModel demoList = new DefaultListModel();
 demoList.addElement("addElements");
 JList listd = new JList(demoList);

That way you can add elemets into the LIST.

Answer 3

You may add it ( new object ) to the itemsVector (Vector). After adding an item into Vector object invoke the items.setListData(itemsVector); method.

Answer 4

尝试使用add方法，如下所示： items.add(newItem) 。

Answer 5

I'm using code similar to the following:

public void addRow(MyObject object)
{
    Object[] objects = new Object[]{object.getSomeInt(), object.getSomeString()};
    DefaultTableModel tableModel = (DefaultTableModel) table.getModel();
    tableModel.addRow(objects);
}

Answer 6

Try this:

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]);

}

source : java2s

Answer 7

private javax.swing.JList<String> list1;
list1.setFont(new java.awt.Font("Tahoma", 0, 24));

DefaultListModel listModel1 = new DefaultListModel();

String st="Working hard";
listModel1.addElement(r);

list1.setModel(listModel1);