Using Java swing layout

I'm rather new at this and i'm having trouble creating my desired layout, actually i'm having trouble picking my desired layout.
this is how i'd want my program to look...
name place time address
mary Hos. 12:00 70 sine st. JButton
Kay Sch. 1:00 13 cos st. JButton
JButton("OK")
Hopefully you have some idea of where i'm heading. I don't want a table because i want this to be uneditable so i'm doing with with panels. the spots marked "JButton" are of course Buttons (their functions are not important). at the bottom is a single "OK" Jbutton that is aligned with the other JButtons above it.
my issues are as follows,
I have just 4 title labels (name, place, time, address) but there are essentially 5 components that make up the body of the list (all the others + a JButton). can anyone tell me what Layout i should use?? i've tried GridBag but i'm having trouble with the JButtons. And How in the world can i place the final OK button?

I suppose those things were supposed to be arranged in columns? Then you want a JTable. And if you want it to be uneditable, then just make it uneditable. There's no need for enormous workarounds.

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How can I use java swing class in JSP page design

I am a new developer in Java server pages. I want to use layout managers available in java swing classes to design the page. Can any body suggest me a way to do this.Is it possible if I do it with servelets.

So, you want to use layout managers within your JSPs?
The immediate answer is that "it isn't a good idea". The more considered answer is "tell us what you're up to".
Are you coding all presentation within a traditional JSP? That is, HTML, customer or library tags and/java scriptlets?
Or are you building your HTML within your servlets and sending that back to the browser?
If the first, then you are probably better off either using explicit HTML tables (or the equivalent custom tags) or finding a library that you can use.
If the second, you can write classes similar to the Swing layout managers that end up being a fancy way of putting elements into an HTML table. We have exactly that in my current environment. I wouldn't recommend rolling your own and I'd tend to leave all that presentation stuff to the JSP.
In any case, you can't really use the Swing layout managers as they are for an entirely different pradigm.

Creating file browser GUI using java swing tree

Hi all,
I have some questions which i wish to clarify asap. I am working on a file browser project using java swing. I need to create 2 separate buttons. 1 of them will add a 'folder' while the other button will add a 'file' to the tree when the buttons are clicked once. The sample source code known as 'DynamicTreeDemo' which is found in the java website only has 1 add button which is not what i want. Please help if you know how the program should be written. Thx a lot.
Regards,

Sorry, don't know 'DynamicTreeDemo'import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
import java.io.File;
public class Test extends JFrame {
JTree jt = new JTree();
DefaultTreeModel dtm = (DefaultTreeModel)jt.getModel();
JButton newDir = new JButton("new Dir"), newFile = new JButton("new File");
public Test() {
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    newDir.setEnabled(false);
    newFile.setEnabled(false);
    jt.setShowsRootHandles(true);
    content.add(new JScrollPane(jt), BorderLayout.CENTER);
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    dtm.setRoot(root);
    addChildren(root);
    jt.addTreeSelectionListener(new TreeSelectionListener() {
      public void valueChanged(TreeSelectionEvent tse) { select(tse) ; }
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    content.add(jp, BorderLayout.SOUTH);
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    jp.add(newFile);
    newDir.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        TreePath tp = jt.getSelectionPath();
        if (tp!=null) {
          DefaultMutableTreeNode dmtn = (DefaultMutableTreeNode)tp.getLastPathComponent();
          File newFile = new File((File)dmtn.getUserObject(),"foo");
          if (newFile.mkdir()) {
            dmtn.add(new DefaultMutableTreeNode(newFile));
            dtm.nodeStructureChanged(dmtn);
          } else System.out.println("No Dir");
    newFile.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent ae) {
        TreePath tp = jt.getSelectionPath();
        if (tp!=null) {
          DefaultMutableTreeNode dmtn = (DefaultMutableTreeNode)tp.getLastPathComponent();
          File newFile = new File((File)dmtn.getUserObject(),"foo.txt");
          try {
            if (newFile.createNewFile()) {
              dmtn.add(new DefaultMutableTreeNode(newFile));
              dtm.nodeStructureChanged(dmtn);
            } else System.out.println("No File");
          catch (java.io.IOException ioe) { ioe.printStackTrace(); }
    setSize(300, 300);
    setVisible(true);
void select(TreeSelectionEvent tse) {
    TreePath tp = jt.getSelectionPath();
    newDir.setEnabled(false);
    newFile.setEnabled(false);
    if (tp!=null) {
      DefaultMutableTreeNode dmtn = (DefaultMutableTreeNode)tp.getLastPathComponent();
      File f = (File)dmtn.getUserObject();
      if (f.isDirectory()) {
        newDir.setEnabled(true);
        newFile.setEnabled(true);
void addChildren(DefaultMutableTreeNode parent) {
    File parentFile = (File)parent.getUserObject();
    File[] children = parentFile.listFiles();
    for (int i=0; i<children.length; i++) {
      DefaultMutableTreeNode child = new DefaultMutableTreeNode(children);
parent.add(child);
if (children[i].isDirectory()) addChildren(child);
public static void main(String[] args) { new Test(); }

How to store grid points in a file using Java Swing?

Please someone help me with any suggestions about how to store the grid points in a file using Java Swing

Actually i have designed a gridlayout in Java Swing and have added some components to it such as buttons or images....My problem is when I click on any of the cell of the grid,the corresponding cell number should be stored in an external file....Do u have any suggestions on how to do it?

How to create a semi circuler slider using java swing or awt

I am trying to create a Jslider like thing but in semicirculer shape. Thanks in advance for providing any help.

Is it possible to create such UI in java swing?Just to further illustrate, Swing only provides the raw foundation you need to be able to build a GUI. With the stock components you can create static user interfaces with standard controls. If you want to go further, you need to either find a component that somebody else already wrote, or you go into custom painting as previous posters suggested. To do an animating component for example, you would need all the frames as BufferedImage objects and you would combine custom painting with a Swing timer to update the displayed frame at a specified framerate.
if you search for "java swing animation" using google, I'm sure you can find the examples you need. And here is the trail about swing timers:
http://java.sun.com/docs/books/tutorial/uiswing/misc/timer.html

How to Update existing XML File Using Java Swing

Hi,
I am reading XML file and getting keywords into JList. When i add some keywords into JList through textfield and remove keywords JList, then after click on save button it should update xml file. How can i do it ?
Please provide me some code tips for updating xml file
This is the code that i am using for reading XML File:
import javax.swing.*;
import java.awt.event.*;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import java.io.IOException;
import java.util.*;
import java.text.Collator;
import java.util.regex.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import com.cloudgarden.layout.AnchorConstraint;
import com.cloudgarden.layout.AnchorLayout;
public class getKeywords extends JFrame implements ActionListener
static JPanel p;
static JLabel lbl;
static JButton btnSave,btnAdd,btnRemove;
static String path;
static Vector v;
static JList lstCur;
static JTextField txtKey;
Document dom;
static image imgval;
NodeList nodelstImage;
static AnchorLayout anchorLay;
private DefaultListModel lstCurModel;
public getKeywords()
     super("Current Keywords");
    v=new Vector();
    p=new JPanel();
    txtKey=new JTextField(10);
    btnAdd=new JButton("Add");
    btnRemove=new JButton("Remove");
    btnSave=new JButton("Save");
    lbl=new JLabel("Current Keywords");
    lstCurModel=new DefaultListModel();
        lstCur=new JList();
        JScrollPane scr=new JScrollPane(lstCur);
    runExample();
     lstCur.setModel(lstCurModel);
     p.add(lbl);
     p.add(scr);
     p.add(txtKey);
     p.add(btnAdd);
     p.add(btnRemove);
     p.add(btnSave);
     add(p);
     btnAdd.addActionListener(this);
     btnRemove.addActionListener(this);
     btnSave.addActionListener(this);
     setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
public static void main(String arg[])
     getKeywords g=new getKeywords();
     g.resize(250,400);
     g.setVisible(true);
public void actionPerformed(ActionEvent ae)
     if(ae.getSource()==btnAdd)
          lstCurModel.addElement(txtKey.getText());
     if(ae.getSource()==btnRemove)
          lstCurModel.remove(lstCur.getSelectedIndex());
     if(ae.getSource()==btnSave)
          //Code to Write
     public void runExample()
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          //System.out.println(lmlval.Title);
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          DocumentBuilderFactory builderFac = DocumentBuilderFactory.newInstance();
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               dom = builder.parse("LML.xml");
          catch(ParserConfigurationException pce)
               pce.printStackTrace();
          catch(SAXException sax)
               sax.printStackTrace();
          catch(IOException ioex)
               ioex.printStackTrace();
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               for(int i = 0; i < nodelstImage.getLength(); i++)
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                    imgval = myImgval.getimage(el);
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                    lstCurModel.addElement(x[s].trim());
                    //System.out.println(x[s].trim());
}     Thanks
Nitin

You should update your DOM document to represent the changes that you want made.
Then, using the Transformation API you simply transform your document onto a stream representing your file. Something like this:
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
// TODO - set indentation amount!
Source source = new DOMSource(dom);
Result result = new StreamResult(file);
transformer.transform(source, result);Hope this helps.

How to make a cellspan or rowspan by using java.swing.JTable

I tried to create a table with some rowspan and colspan. But It seems like the jdk does not support this features. Does any one know how to do it? Any help will be appriciated.

Have you tried the examples provided at the link shown below:
http://www2.gol.com/users/tame/swing/examples/JTableExamples4.html
;o)
V.V.

How to use a DropDownList in Java Swing.Its very very Urgent

Hi Sir,
Here i need to know how to do (or) create a dropdownlist by using Java Swing.I know that there is JMenuBar & JMenuItems without using that when i click a JButton for example the dropdownlist should come from the top to bottom.I have already posted this quesion once.And i found that it has been removed.So i hope that this time i will get a better answer.Pls.do provide the code as well sir.So that i will be very thankful to u.Since i am involved in a project which contains this
feature.It is very very Urgent.So pls.do provide the code i will be waiting for the reply.
Thanx,
m.ananthu

use JComboBox
JComboBox liste = new JComboBox(new Object[]{"azerty","qwerty});the api documentation :
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JComboBox.html
the turotial on combobox :
http://java.sun.com/docs/books/tutorial/uiswing/components/combobox.html

How to use java api while java programming especially using javase and java swing?

i need help for java api for undo, redo, htmleditorkit,editorkit.
in my project i have to use java swing for desktop application but, i need help for how to implement and how to retrieve java api.
please reply with example or code..

i need help for java api for undo, redo, htmleditorkit,editorkit.
in my project i have to use java swing for desktop application but, i need help for how to implement and how to retrieve java api.
please reply with example or code..
You find examples and code by searching the internet, not by using forums.
Start with The Java Tutorials - it has trails for the bulk of the Java functionality.
See the trail 'How to Write an Undoable Edit Listener'
http://docs.oracle.com/javase/tutorial/uiswing/events/undoableeditlistener.html
You learn by DOING - not by reading. Actually DO the tutorial example and try to understand WHAT it does and HOW it does it.
Then search for other tutorial trails that are of interest.

Java swing dynamic forms (in a loop)

Hi All,
Is it possible to dynamically create forms using java swing? What I mean to ask is that if I have the necessary information in a table, like the label and a corresponding text field, I can loop through and create the required number of fields. If I do it this way and when the users add text, will I not lose the ability to access each JTextField through its own variable? Is this possible? Basically, I need to be able to access each field through its own variable to do some additional validations on the text entered, etc. Please let me know, if it is possible through java swing.
Any help in this regard is greatly appreciated.
Thanks.

mrbean1975 wrote:
..Is it possible to dynamically create forms using java swing? If by java swing you mean Java Swing, then yes.

How to search and replace in an xml file using java

Hi all,
I am new to java and Xml Programming.
I have to search and replace a value Suresh with some other name in the below xml file.
Any help of code in java it is of great help,and its very urgent.
I am using java swings for generating two text boxes and a button but i am not able to search in the xml file thru the values that are entered into these text boxes.
Thanks in advance.
**XML File*
<?xml version="1.0" encoding="ISO-8859-1"?>
<student>
<stud_name>Suresh</stud_name>
<stud_age>40</stud_age>
</student>Also i am using SAX Parser in the java program
any help of code or any tutorials for sax parisng is very urgent please help me to resolve this problem
Edited by: Karthik84 on Aug 19, 2008 1:45 AM
Edited by: Karthik84 on Aug 19, 2008 3:15 AM

Using XPath to locate the elements you are after is very easy.
Try something like this:
import java.io.File;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
public class BasicXMLReplaceWithDOM4J {
     static String inputFile = "C:/student.xml";
     static String outputFile = "C:/studentRenamed.xml";
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          Document doc = DocumentBuilderFactory.newInstance()
                    .newDocumentBuilder().parse(new InputSource(inputFile));
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          Transformer xformer = TransformerFactory.newInstance().newTransformer();
          xformer.transform(new DOMSource(doc), new StreamResult(new File(outputFile)));
}- Roy

Help with java swing

Hi people!i need some help
Im a new user for java programming language.Well im programming an application using java swing libraries. I have some problems trying to accesing variables from those swing Jpanels. Ill make it clear....
Im using Netbeans...
I have a class for the window (a JFrame) including 2 Jtextfields and 2 Jlabels
import .......
public class myclass extends javax.swing.JFrame{
public double gp;
public double gv;
public G() {
initComponents();
gpnom=this.gpnom;
gvnom=this.gvnom;
private void TXFgpnom(java.awt.event.ActionEvent evt) { //TXField
gpnom= Double.parseDouble(TXFgpnom.getText());
gvnom= Double.parseDouble(TXFgvnom.getText());
.......//theres a lot of more code .for listeners..next...
Now ive created a new file (a new class)in the same package ,but i cant access public variables from swing class
//the next class was created in a new file
public class hi () {
JPanel prin =(JPanel) new myclass().getContentPane(); //ok
double number=gpnom // error variable not found
When i try to get the value of "number" ...i always get "ERROR" And the class for that textfield was public..i think...
HOw can i use variables from that Jpanel?
Id appreciate an answer...
thanx for your help!
Paco

In future Swing related questions should be posted in the Swing forum and camickr will be more likely to answer if you have used code tags to properly format your code.
Luckily this problem does not seem to be Swing related in the least because the public variables you have in your other class are named gp and gv and further when you access public variables (or properties) of a class you must access them by an instance of that class. Which you don't appear to be doing either.

How to send a string from sender to receiver side using java

I am doing a project on Digital Signature.I have already done with the GUI using java swing.
Now i want to send a string from the sender side to the receiver side on the click of a button using socket programming.
Please can anybody provide me with the code as early as possible.

http://catb.org/~esr/faqs/smart-questions.html

How Hard is it to program in Java.Swing

Hi
I wanted to program using java.swing component but i don't have any idea where i should start.
I have been programming in java using java.Awt
and i can do simple array programing.
So how hard is it, and Where should i start learning java.swing. Ps I don't know anything about Swing, I don't even know what it is.
Thanks you

Hi
As the previous guy said it is quite easy, and that link should teach you the basics. What I want to remind you of is that Swing uses up more memory when run. But it also have a few nicer extra goodies that make coding a little bit easier. Have fun with it.
Here are a few more sites
<http://manning.spindoczine.com/sbe/>
<http://java.sun.com/docs/books/tutorial/uiswing/>
Ciao

How to Play a sample sound using Java

Hi,
I have an mp3 music files in database. When a user chooses a particular button, all the songs are fetched from the database.
I have two buttons namely, 'Buy' and 'Play Sample'. If I click the 'Play Sample' button, a sample of the song has to be played (not the full song). If the user likes the sample, he can buy the full song.
My question is how to achieve the 'Play Sample' using Java Swings and Sound. I have googled, but not find any solutions. Please provide me an example or link.
Thanks in advance.

HI
Actually i am trying to create a JFrame which plays an mp3 music file
with the help of play and stop buttons in it ...
i splitted the frame into two
i want a music file list in the first frame (JComboBox)
and want to have play and stop button in the second frame .
i had tried out some code in which the frame part is fine ,,,
but i am not knowing how to play the file with those buttons ...
here is the code and plz help me to move further ...
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
public class AudioFile extends JFrame {
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        JPanel jp2 = new JPanel();
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        JButton p= new JButton("PLAY");
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        JComboBox musiclist=new JComboBox(musicfiles);
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        jp2.add(p);
        JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
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        getContentPane().add(splitPane);
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        sp.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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}

Using Java swing layout

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