jlist

This question already has an answer here: Cannot refer to a non-final variable inside an inner class defined in a different method 20 answers So i have a JList and i am trying to use it inside of a JButton s actionPerformed method and it is asking me to make the JList final why is that, below is a code snippet public SomeClass() { btnNewButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { list.clearSelection(); }}); } I don't actually have a problem making it final, I just am not sure why i would need to. To answer your question, you need to understand

In a GUI app that I am working on, I require to select multiple files but instead of directly opening it with the File chooser I first need to add all required files in a Selected list (so that instead of selecting files again and again from different directories I can select them all at a time and then open all the files added to that list). Moreover I should also be able to remove multiple files from those present in that Selected File list too. Is that possible with JFileChooser or do I need to design one as per my requirements? What you are looking for is not a standard feature, but you

i have a JList and an ArrayList.How to bind the datas in arraylist to the jlist.Are the any alternative methods? ArrayList arl = new ArrayList(); arl.add("1asdsd"); arl.add("2asdsd"); arl.add("3asdsd"); Object obj = arl.clone(); JList list = new JList(obj); how to bind the above code.Now the code give an error. You don't need to clone the ArrayList. Just call toArray() JList list = new JList(arl.toArray()); ArrayList<String> aList = new ArrayList<String>(); aList.add("blabla"); aList.add("blublu"); aList.add("blibli"); aList.add("bleble"); DefaultListModel<String> model = new DefaultListModel

I have an array of objects that contain the name of customers, like this: Customers[] How I can add those elements to an existing JList automatically after I press a button? I have tried something like this: for (int i=0;i<Customers.length;i++) { jList1.add(Customers[i].getName()); } But I always get a mistake. How I can solve that? I am working on NetBeans. The error that appears is "not suitable method found for add(String). By the way my method getName is returning the name of the customer in a String. The add method you are using is the Container#add method, so certainly not what you need.

OK so I'm doing a small part of my inventory. I got MOST of it down. I'm trying to add string items to an ArrayList then add that to a JList. However, I'm getting this error when I compile: C:\Users\Dan\Documents\DanJavaGen\inventory.java:30: cannot find symbol symbol : constructor JList(java.util.ArrayList<java.lang.String>) location: class javax.swing.JList list = new JList(arr); It's probably some rookie mistake I am making ... :/ Code: import java.applet.Applet; import java.awt.*; import javax.swing.*; import javax.swing.JList; import java.awt.event.*; import java.util.ArrayList; import

Can anyone tell me a short way to delete the selected items from my JList ? I searched on google and here, but I found very many ways. Which way should I use? As @Andreas_D said, the data centered, more abstract ListModel is the solution. This can be a DefaultListModel . You should explicitly set the model in the JList. So (thanks to comment by @kleopatra): DefaultListModel model = (DefaultListModel) jlist.getModel(); int selectedIndex = jlist.getSelectedIndex(); if (selectedIndex != -1) { model.remove(selectedIndex); } There are several remove... methods in DefaultListModel. By the way, this

If a selected index on a JList is clicked, I want it to de-select. In other words, clicking on the indices actually toggles their selection. Didn't look like this was supported, so I tried list.addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent evt) { java.awt.Point point = evt.getPoint(); int index = list.locationToIndex(point); if (list.isSelectedIndex(index)) list.removeSelectionInterval(index, index); } }); The problem here is that this is being invoked after JList has already acted on the mouse event, so it deselects everything. So then I tried removing all of JList

I'm having an issue with Threads using netbeans Swing GUI. This is my first time really trying to develop a GUI for a backup program using Java's File System Notifier. I have two files SyncUI.java and Sync.java . Pretty much what I want to happen is you enter a directory path in the jTextField1 text field which creates a sync thread that creates a new sync object and then calls processEvents on that object. When a file in that directory is changed I want to add text about the change to the list. In its current state the UI is no longer not responding, however the processEvents isn't adding