JList不显示所有读取的元素

Question

everyone. I have a JList inside a JPanel, which I initialized with the following code:

DefaultListModel lmodel;
lmodel=new DefaultListModel();
jList1.setModel(lmodel);

JList was created in the Netbeans visual editor and put inside JScrollPane1. When I add or remove a few elements from the model, everything works just fine. Nevertheless, there seems to be a limit to the number of elements the JList can show, which is weirdly set at 294.

I have a method that reads items from a text file, which is pretty standard:

BufferedReader inputStream=new BufferedReader(new FileReader(nomeArquivo));
String line = inputStream.readLine();
while (line!=null) {
    int i=line.indexOf("=");
    if (i>0) {
       lmodel.addElement(line);                        
    }
    line = inputStream.readLine();
}         
inputStream.close();
System.out.println("Final list size="+jList1.getModel().getSize());               

All trys and catches are in place - this is just a fragment. There is no reading error and everything goes well, with no exceptions.

When I read a file that contains 400 elements, all those 400 elements are inside the lmodel. I can even save them afterwards (there is a method for that too) and the println at the end of the method gives me the number 400 as read.

Nevertheless, the list never shows more that 294 elements. If I had a number x of elements in the list, only 294-x elements are viewed on screen.

Does anybody know what might be happening?

Thank you in advance for your help.

Answer 1

Did you put your JList inside of a ScrollPane? If you have more than whats visible in the List you should be able to scroll through all 400? Try this somewhere since you didn't post all of your code up

JScrollPane scrollPane = new JScrollPane(jList1);

then put the scroll pane onto the panel. Or if your using a gui editor remove your old JList and put the scrollpane on and then add the Jlist to the scroll pane. I hope this helps!