I am trying to add a scroll bar to a JTextArea. Would someone please tell me what I did wrong with the code below?
JFrame frame = new JFrame ("Test");
JTextArea textArea = new JTextArea ("Test");
JScrollPane scrollV = new JScrollPane (textArea);
JScrollPane scrollH = new JScrollPane (textArea);
scrollV.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollH.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
frame.setVisible (true);
Thank you in advance.
EDIT: I fixed the code with the Adel Boutros' advice below.
//FRAME
JFrame frame = new JFrame ("Test");
frame.setSize(500,500);
frame.setResizable(false);
//
//TEXT AREA
JTextArea textArea = new JTextArea("TEST");
textArea.setSize(400,400);
textArea.setLineWrap(true);
textArea.setEditable(false);
textArea.setVisible(true);
JScrollPane scroll = new JScrollPane (textArea);
scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
frame.add(scroll);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
It doesn't work because you didn't attach the ScrollPane to the JFrame.
Also, you don't need 2 JScrollPanes:
JFrame frame = new JFrame ("Test");
JTextArea textArea = new JTextArea ("Test");
JScrollPane scroll = new JScrollPane (textArea,
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
frame.add(scroll);
frame.setVisible (true);
Open design view
Right click to textArea
open surround with option
select "...JScrollPane".
A scroll pane is a container which contains another component. You can't add your text area to two different scroll panes. The scroll pane takes care of the horizontal and vertical scroll bars.
And if you never add the scroll pane to the frame, it will never be visible.
Read the swing tutorial about scroll panes.
You don't need two JScrollPanes.
Example:
JTextArea ta = new JTextArea();
JScrollPane sp = new JScrollPane(ta);
// Add the scroll pane into the content pane
JFrame f = new JFrame();
f.getContentPane().add(sp);
Related
When I resize the window, the scroll frame doesnt resize with it and just goes out of frame.
Is there any way to fix this? Here's a snippet of the code:
TextEditor(){
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setTitle("Emu Editor J");
this.setSize(700,550);
this.setResizable(true);
this.setLayout(new FlowLayout());
this.setLocationRelativeTo(null);
textArea = new JTextArea();
textArea.setLineWrap(true);
textArea.setWrapStyleWord(true);
textArea.setFont(new Font("Cascadia Code",Font.PLAIN,20));
scrollPane = new JScrollPane(textArea);
scrollPane.setPreferredSize(new Dimension(this.getWidth()-25,this.getHeight()-100));
// scrollPane.setSize(this.getWidth()-25,this.getHeight()-100);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
I tried allowing resizable and it didn't work
Try using BorderLayout and add the panel to it with BorderLayout.CENTER.
I have a frame f, panel Fpanel. and textarea j.
This is a part of my code.
The scroll does not seem to be working on my text area.
JTextArea j=new JTextArea();
j.setBounds(60,150, 400,400);
j.setMargin(new Insets(3,3,3,3));
j.setEditable ( false ); // set textArea non-editable
JScrollPane scroll = new JScrollPane(j);
scroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
scroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
I have added
Fpanel.add(scroll);
and
f.add(Fpanel);
to my code as well but it does not seem to be scrolling.
Am I missing a piece of the code or have I written something incorrectly?
if you want to have a vertical scroll bar:
JPanel panel = new JPanel();
JScrollPane jsp = new JScrollPane(panel, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
if you want to have a horizontal scroll bar:
JPanel panel = new JPanel();
JScrollPane jsp = new JScrollPane(panel, ScrollPaneConstants.HORIZONTOL_SCROLLBAR_ALWAYS, ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
i am new to java swing, currently i am developing an application using java swing, i am facing the problem is that when i populate my JList with JScrollPane it is displaying on my whole jframe.
code:
List<Element> parentElements = xmlUtil.getParentElements();
String title = "License";
JFrame f = new JFrame(title);
String[] parentTags = new String[parentElements.size()];
for(int i=0;i<parentElements.size();i++)
{
System.out.println(parentElements.get(i).getName());
parentTags[i] = parentElements.get(i).getName();
}
JList list = new JList(parentTags);
JScrollPane scrollPane = new JScrollPane(list, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
scrollPane.setPreferredSize(new Dimension(50,40));
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container contentPane = f.getContentPane();
contentPane.add(scrollPane);
f.setSize(900, 700);
f.setVisible(true);
Output:
i want output like this so it can cover small area in jframe
Please tell me how to resize it ? as i am stuck into this problem from very long time.
Add the JScrollPane to a JPanel and then add the JPanel to the JFrame:
JScrollPane scrollPane = new JScrollPane(list, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container contentPane = f.getContentPane();
JPanel panel = new JPanel();
panel.add(scrollPane);
panel.setPreferredSize(new Dimension(50,40));
contentPane.add(panel);
Then you can use the setPreferredSize method of the JPanel to resize it how you want.
Also consider using a good layout manager. I use a combination of two (primarily):
Netbeans' drag-and-drop WYSIWYG editor (Matisse)
MigLayout -- easily the best hand-written layout available. Some learning curve required (but less learning than the rest).
I'm trying to build a Java GUI where among other things there will be several tabs.
In one of the tabs I want to have both a scrollable JTextArea, and also some buttons at the top/bottom that interacts with the JTextArea. I can't figure out how to get both into the same tab, I'm either getting the buttons and a non-scrollable jtextarea, or just the scrollable jtextarea. I also don't want to display the button in the other tabs. Here is my code:
private final JTextArea music = new JTextArea();
private final JTextArea button = new JTextArea();
private final JTextArea test = new JTextArea();
private final JTabbedPane tab = new JTabbedPane();
private JTable table;
music.append(newPlaylist.toString());
JFrame frame = new JFrame("GUI");
frame.setTitle("Music File Organiser");
JPanel panel = new JPanel();
panel.setLayout(new FlowLayout(FlowLayout.CENTER));
JButton button1 = new JButton("Hello");
JButton button2 = new JButton("Sort by Album Title");
JButton button3 = new JButton("Sort by Track Title");
button1.addActionListener(new ActionListener() {code};
button2.addActionListener(new ActionListener() {code};
button3.addActionListener(new ActionListener() {code};
panel.add(music);
panel.add(button1);
panel.add(button2);
panel.add(button3);
JScrollPane scroll = new JScrollPane(panel);
JScrollPane scroll2 = new JScrollPane(table);
tab.add("Music Files", scroll);
tab.add("Table", scroll2);
this.add(tab);
frame.setLocationRelativeTo(null);
this.setSize(1200, 1000);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
The tab in mind is the first one. How do I add buttons to "scroll"? The way I'm trying it here is to add the JTextArea "music" into panel, then adding the buttons to the same panel, then adding the panel to a JScrollPane, and then adding the JScrollPane to tab. Any help would really be appreciated.
Encapsulate your visual elements into child Panels.
JPanel buttonPanel = new JPanel(); //panel for buttons.
buttonPanel.add(button1);
buttonPanel.add(button2);
buttonPanel.add(button3);
JScrollPane scroll = new JScrollPane(music); //scrollable pane for JTextArea
panel.add(buttonPanel);
panel.add(scroll); //add sub-components to panel for tab
/*here you would add some layout code to fit the panel and scroll into the associated spaces */
tab.add("Music Files", panel); //add panel to tab
You can do something like this:
JPanel tab = new JPanel()
JPanel tabWithButtons = new JPanel()
JPanel tabWithScrollPanel = new JPanel()
tab.add(tabWithScrollPanel)
tab.add(tabWithButtons)
IMO this is better way, because I assume that buttons shouldn't be included in JScrollPane and they should be visible all the time
Of course, you have to add all elements to proper JPanels.
Also, you can try with width/height settings of panel which contains all your elements, maybe ScrollArea panel is to big?
I'd like to use a JScrollPane for a panel which has an arbitrary list of labels in it using box layout. I'm trying to get it so that the scrollbar would appear if there were too many items (labels) to display.
I tried adding a JScrollPane to the panel and then add the labels but then I don't see any scroll bar.
Any ideas?
TIA
For this kind of thing, you'd normally use a JList or JTable (if you need custom rendering).
Make sure that you call validate() or revalidate() on the JScrollPane after adding an item, to force the preferred size of the panel to be recalculated.
Here's how I did it.
JPanel midPanel = new JPanel();
midPanel.setLayout(new BoxLayout(midPanel, BoxLayout.Y_AXIS));
midPanel.add(new JLabel("<html><u>Label</u>"));
Box box = Box.createVerticalBox();
for (Item item : data.getInventory()) {
inventory.add(box.add(new JLabel(item.getName())));
}
JScrollPane jscrlpBox = new JScrollPane(box);
midPanel.add(jscrlpBox);
add(midPanel, BorderLayout.CENTER);
From:
http://www.java2s.com/Code/Java/Swing-JFC/JScrollPanetoholdscrollablecomponent.htm
Did you remember to set the preferred size of the content panel?
final JFrame frame = new JFrame("Scroll Demo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
final Box textArea = Box.createVerticalBox();
final JScrollPane textAreaScroll = new JScrollPane(textArea);
textAreaScroll.setPreferredSize(new Dimension(80,150)); /* essential! */
JButton addButton = new JButton("ADD");
addButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
textArea.add(new JLabel("abc"));
textArea.revalidate();
}
});
frame.getContentPane().add(textAreaScroll, BorderLayout.SOUTH);
frame.getContentPane().add(Box.createRigidArea(new Dimension(10,10)), BorderLayout.CENTER);
frame.getContentPane().add(addButton, BorderLayout.NORTH);
frame.pack();
frame.setVisible(true);
In this example, the scroll bar works correctly, but if you remove the line marked as "essential", it will not work anymore.