jlist

问题 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. 回答1: You don't need to clone the ArrayList. Just call toArray() JList list = new JList(arl.toArray()); 回答2: ArrayList<String> aList = new ArrayList<String>(); aList.add("blabla");

问题 This question already has answers here : Cannot refer to a non-final variable inside an inner class defined in a different method (20 answers) Closed 6 years ago . 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

问题 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

问题 I have a JList containing an ArrayList of custom objects and I'm trying to create a drag and drop into fields. I'm having trouble understanding how to package and receive the object in Transferable. This is about as far as I've gotten: import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.util.*; public class FlightProjectInterface extends JFrame{ //create GUI Objects private JFrame primaryFrame; private JPanel createFlightPanel; private

问题 I created a database, in which one of the table name is Location which has 2 columns named Stadium and City. I want that data in each column should get retrieved in 2 JList, but I don't know how. Can you guys tell me how to do it? 回答1: The normal way to display a table from a database is of course a JTable . But if you want to opt for 2 JList s instead, it is basically the same principle. Create a model based on the contents of the database (in this case a ListModel ). You can probably just

问题 Hi Friends I have a DefaultPieDataset that am Creating this way: package business.intelligence.system; import java.awt.Color; import java.awt.Component; import java.awt.Dimension; import java.awt.Rectangle; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import javax.swing.JInternalFrame; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import javax.swing.*; import java.sql.Connection; import java.sql

问题 In Swing, is there a property to set a JList disabled foreground color? I'm using the Netbeans GUI builder and I want to add a property to the resource properties file that sets the color of the text in a JList to a different default when the JList is disabled. Using the Nimbus LAF, there is a different color for this because the text is gray when disabled but black when enabled. I just don't want it to be grey when disabled. The standard foreground color is just .foreground. Thanks. 回答1: The

问题 i have created a Jcombobox and i have populated it from data base, i have a JList and i want every item i select in the combobox to be added on the JList. i'm new to java and i tried to solve the problem with this code but it's not working : private void addelementActionPerformed(java.awt.event.ActionEvent evt) { DefaultListModel liss = new DefaultListModel(); Object s = empcombo_s.getSelectedItem().toString(); for(int i =0; i<=1;i++) { liss.add(i, s); } stagelist.setModel(liss); } 回答1: now

问题 I am attempting to build a twitter client using Twitter4. I am storing the users tweets and info etc in a DefaultListModel in a Jlist. I want to add the users profile picture and to do this I am setting the Icon using a ListCellRenderer. My issue here is that I am only able to set the ListCellRenderer text and icon to one users information. I use a loop to pull down multiple tweets and add them to the model, but the renderer is only setting one tweet many times. This is the code to retrieve a

问题 Ok what am trying to do is allow the user to make a list for themselves, what ever they type in in the TextField the output of that will be shown in the Jlist but my problem here is that if i type in another word to the TextField the output of that is either appending or replacing the other word that was already there it suppose to go beneath the other word and save there can anyone help me please?? public lala(){ b2 = new JButton("ADD"); b2.addActionListener(new ActionListener(){ public void