How do I output an ArrayList in a Window?

Question

I try to display an ArrayList in a nice way into an InfoBox. The ArrayList contains names (String) of files that got edited in a certain period of work and gets created automatically.

If I use JOptionPane.showMessageDialog, I get a super long window that is impossible to read. It would be better to have a nice list view. How do I do that?

The parts of the code affected:

//List initiation

List output = new ArrayList();

//FIll List with data

for (String fileOrFilderName : changedFilesAndFolders) { 
    output.add(fileOrFilderName);
}

//Output

JOptionPane.showMessageDialog(null, output, "Edited or added files",
                   JOptionPane.INFORMATION_MESSAGE);

Output: Too long window

//List initiation List output = new ArrayList(); //FIll List with data for (String fileOrFilderName : changedFilesAndFolders) { output.add(fileOrFilderName);} //Output JOptionPane.showMessageDialog(null, output, "Edited or added files", JOptionPane.INFORMATION_MESSAGE); — Ben
– Ben, Commented Jan 30, 2017 at 10:02
Create your own dialog, insert a JList, make it scrollable and insert your values. — IQV
– IQV, Commented Jan 30, 2017 at 10:02

anacron · Accepted Answer · 2017-01-30 10:38:23Z

2

Bundle your output into a javax.swing.JList decorated by a javax.swing.JScrollPane.

For example:

    List<String> output = new ArrayList<>();

    //FIll List with data
    for (String fileOrFilderName : changedFilesAndFolders) {
        output.add(fileOrFilderName);
    }

    //Output

    JList<String> list = new JList<>(new Vector<>(output));

    JOptionPane.showMessageDialog(null, new JScrollPane(list), "Edited or added files", JOptionPane.INFORMATION_MESSAGE);

Hope this helps!

answered Jan 30, 2017 at 10:38

anacron

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1 Comment

Ben Over a year ago

thats exactly what i was looking for, it worked. Thanks!

eldix_ · Accepted Answer · 2017-01-30 10:36:03Z

0

@Benjamin Maier, you can add any JComponent om the JOptionPane. So what you do is to add JScrollpane to it containing JList.

answered Jan 30, 2017 at 10:36

eldix_

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