Jlist Problem

JohnnyBravo

I was wondering if you can update a jlist the same way you update a combo box after getting information from an sql statement


Here is my code but the compiler doesnt recognize the add feature





private void populateQueue()
{
try
{
String sql = "SELECT DISTINCT QueueRelationTable.Queue FROM QueueRelationTable;";
ResultSet result = stmt.executeQuery(sql);

while(result.next())
{
jList1.add(result.getString("Queue")); // here is where the problem is
}
}
catch (Exception e)
{
e.printStackTrace();
}

}


Thanking you in advance Johnny Bravo

Enygma

The add method takes a Component as an argument. Take a look at JLists on www.javaalamanac.com

Dr Pepper

JB,

As far as I know, a JList doesn't really store a list of items.. It just displays it. You can store the items in a vector.

Vector V = new Vector();

V.add("Item 1");
V.add("Item 2");

//Instantiate the JList
JList jList1 = new JList( V );

If you want to add items after the JList is created/displayed, you have to add them to the Vector, V and then reset the JList to display the contents of the Vector:

//...
V.add(result.getString("Queue")); 
//...
jList1.setListData(V);

You can use an array instead of a vector but it's handier to use a vector because you can add/take away from it more easily!.. Arrays have a fixed size..