Java updating listmodel string

Question

I have a JList that uses a list model to add strings of text to the JList. I am having trouble figuring out how to update a selected listModel. I am able to select the listModel String (I have verified that what ever I select returns correctly) but I am unable to figure out how to update the listModel string I select. Any help with this would be greatly appreciated. Is there a updateElement(variable) or something I could use to accomplish this?

    String string1 = "hello";
    String string2 = "goodbye";
        String myItem = jlst.getSelectedValue();
    // myItem is the string returned
        listModel.addElement(string1 + string2);
// adds a new element is there anyway to update myItem so string1 and string 2 become apart of the myItem string ?

Steffen · Accepted Answer · 2014-04-30 22:45:40Z

3

Make sure you are using a DefaultListModel.

/* Create model */        
DefaultListModel<String> dlm = new DefaultListModel<>();

/* Add elements */ 
dlm.addElement("test");
dlm.addElement("test2");

/* JList to use the model */ 
JList<String> list = new JList<>(dlm);

/* Update an element */
dlm.set(1, "test3");

answered Apr 30, 2014 at 22:45

Steffen

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camickr · Accepted Answer · 2014-05-01 00:00:45Z

2

I am having trouble figuring out how to update a selected listmodel.

Read the section from the Swing tutorial on How to Use Lists. It has a working example that shows you how to dynamically add/remove elements from the DefaultListModel based on a user interaction with the GUI.

answered May 1, 2014 at 0:00

camickr

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