Setting up a JScrollPane ?

[Dillinger4]

Im trying to create a JScrollPane that contains a JList which is populated with entries which are just Strings. For some reason i get nothing visually at all. When i set the JScrollPane to use scrollbars all of the time what is the default size of the JScrollPane?

public GUI(){
JScrollPane jsp = new JScrollPane();
  jsp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); 
  jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
}

[Dillinger4]

Ok i can now see my JList which is in a JScroll pane. Now how would i go about adding objects to the JList? When i pass in a String[] array to the constructor the JList ends up being empty.

[Andy_Hollywood]

I had an anoying time with JList when i first started playing with them, as i found no easy way to add and remove objects and have the list update properly, so i wrote a List model that implemnts Default List Model and the List interfaces (see attached)


Just Create list:

GenericListModel model = new GenericListModel();
JList list = new JList(model);

this.add(new JScrollPane(list));

now you can use any methods on the model and they will be reflected in the JList...


Is that what you needed or meant?

Andy

[Dillinger4]

So essentially what needs to be done is that i have to create a class that implements the javax.swing.ListModel interface, provide implementation for the four methods that are contained within in the interface then pass in an instance of this class to a JList constructor.