I could not find any class to set a title for TextField. Therefore, I decided to make one. My question is really simple.
Do I really need to include JFrame in my class or maybe there is a different way to accomplish this problem.
Here is my GUI class.
public GUI() {
JFrame f = new JFrame("MyLibrary");
JTextField tf = new JTextField();
tf.setBounds(50, 50, 400, 30);
tf.setFont(new Font("Arial", Font.BOLD, 16));
FieldTitle ft = new FieldTitle(f, tf, "Book title");
f.add(tf);
f.setSize(1280, 720);
f.setLocationRelativeTo(null);
f.setLayout(null);
f.setVisible(true);
}
And here is my FieldTitle class.
public FieldTitle(JFrame f, Component c, String title) {
JLabel l = new JLabel(title);
l.setBounds(c.getBounds().x, c.getBounds().y - 20, c.getWidth(), 20);
f.add(l);
}
Thank you for your time and effort. Have a great day!
Don't use a null layout. Don't use setBounds().
Swing was designed to be used with layout managers. You can easily use a JPanel with a BoxLayout:
Create a JPanel and set the layout to a vertical BoxLayout
Create and add the JLabel to the panel
Create and and the JTextField to the panel
Add the panel to the frame.
Read the Swing tutorial on Layout Managers for more information. You will find a working example that shows how to create a frame with a panel using a BoxLayout.
Related
public void start_Gui() {
JFrame window = new JFrame("Client Program");
window.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
window.setContentPane(panel);
panel.setLayout(new GridLayout(1,2));
JLabel leftside = new JLabel();
leftside.setLayout(new GridLayout(2, 1));
JTextArea rightside = new JTextArea();
rightside.setEditable(false); //add scroll pane.
rightside.setBorder(BorderFactory.createLineBorder(Color.BLACK));
rightside.setLayout(new FlowLayout());
JTextArea client_text_input = new JTextArea();
client_text_input.setBorder(BorderFactory.createLineBorder(Color.BLACK));
leftside.add(client_text_input);
JLabel buttons_layer = new JLabel();
JButton login = new JButton("Login");
JButton logout = new JButton("Logout");
buttons_layer.setBorder(BorderFactory.createLineBorder(Color.BLACK));
buttons_layer.setLayout(new GridLayout(2, 1));
buttons_layer.add(login);
buttons_layer.add(logout);
leftside.add(buttons_layer);
panel.add(leftside);
panel.add(rightside);
window.setSize(300, 400);
window.setResizable(false);
window.setVisible(true);
}
I am working on a simple java chat client gui application. (the server etc, is done by others).
It is not a big project, but my only problem is that whatever I do to try to resize any components on the above GUI, won't work.
For example:
JTextArea client_text_input = new JTextArea();
client_text_input.setSize(100,200);
Won't work.
Thanks for the help.
In Swing, you have two options for layout: do everything manually or let a LayoutManager handle it for you.
Calling setSize() will only work when you're not using a LayoutManager. Since you're using a GridLayout you'll have to use other ways to specify what you want.
Try calling setPreferredSize() and setMinimumSize().
Two things - firstly you should be setting the preferredSize of the scrollpane, but secondly, trying to resize it inside the componentResized handler isn't a very effective technique because the 'resized' events aren't continuous.
check resizing text area in a JFrame
but setXxxSize (for ContainersChilds) works as chaims if you change from setSize() (for TopLayoutContainer) to setPreferredSize() and you have to call pack() before setVisible()
I'm kind of new to the whole "how to arrange your components" thing in JAVA and I couldn't figure out how to realise the following JFrame (I can't post images so I just put the link)
I tried to be as precise as possible about what I already did.
I would like your advice about how to arrange the green part.
Thanks!
EDIT: as some people rightfully said, I didn't put the code of what I did. Here it is:
public Frame(){
this.setTitle("Small application");
this.setSize(445, 500);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
this.setVisible(true);
this.setResizable(false);
JPanel container = new JPanel();
container.setLayout(new BorderLayout());
//Title
JLabel title = new JLabel("Welcome to this application");
title.setHorizontalAlignment(JLabel.CENTER);
title.setPreferredSize(new Dimension(200,50));
title.setFont(new Font("Courrier",Font.BOLD,20));
container.add(title, BorderLayout.NORTH);
//Center part
JPanel centerPart = new JPanel();
JLabel cell1 = new JLabel("Enter all measurements:");
cell1.setPreferredSize(new Dimension(150,20));
JLabel cell2 = new JLabel("Please, select the files...");
cell2.setPreferredSize(new Dimension(150,20));
cell2.setBackground(Color.white);
cell2.setBorder(BorderFactory.createLineBorder(Color.black));
cell2.setOpaque(true);
JButton cell3 = new JButton("Browse");
cell3.setPreferredSize(new Dimension(100,20));
centerPart.add(cell1);
centerPart.add(cell2);
centerPart.add(cell3);
container.add(centerPart, BorderLayout.CENTER);
/*
* I need your help here :)
* I can't figure out how to put the image and the text next to it
*/
//Bottom part
JPanel bottom = new JPanel();
JButton graph = new JButton("Graph");
JButton exit = new JButton("Exit");
bottom.add(graph);
bottom.add(exit);
container.add(bottom, BorderLayout.SOUTH);
this.setContentPane(container);
}
For most practical cases, you use multiple, nested containers, with a LayoutManager suited to the layout within each container.
Each LayoutManager does one specific job, in practice you often want differnt regions of a UI layouted in different ways. So for each region use a separate Container (e.g. JPanel) and set a LayoutManager that suits your layout requirements.
The big hurdle for beginners seems to be to get the point that LayoutManagers can (and often must) be used with nested containers.
Try using a JPanel
Create the JPanel
Place your JPanel into your JFrame
Position the labels, button, textfield onto the newly created JPanel.
It should do the trick. and it is pretty basic. You should be able to do the code on your own!
i am doing a small Gui in java. i am using setBounds methods to set the position of buttons etc on my JFrame , but problem is that when i use it with JPanel button is not visible on JFrame , and without JPanel its quite ok ,, see both the codes and please help me as i am beginner and facing these foolish problems .
This one is working fine
JFrame jframe = new JFrame("Working Fine");
jframe.setLayout(null);
JButton jbutton = new JButton("Position Test");
jbutton.setBounds(0, 0, 100, 100);
jframe.add(jbutton);
jframe.setSize(300,300);
jframe.setVisible(true);
Same code when i add Button to Jpanel then it does not work so whats wrong , please guide me
JFrame jframe = new JFrame("causing problem ");
jframe.setSize(300,300);
JPanel p = new JPanel();
jframe.setLayout(null);
JButton jbutton = new JButton("Position Test");
jbutton.setBounds(0, 0, 100, 100);
jframe.add(p);
p.add(jbutton);
p.setVisible(true);
//jframe.add(jbutton);
jframe.setVisible(true);
please help me in this small problem
You must get rid of the JPanel's layout, in order to set absolute positions:
p.setLayout(null);
The problem is that when you use absolute positioning, the JPanel component has no default size so does not appear. To get it to appear you could do
JFrame frame = new JFrame("No Problem");
JPanel panel = new JPanel() {
#Override
public Dimension getPreferredSize() {
return new Dimension(300, 300);
};
};
panel.setLayout(new FlowLayout(FlowLayout.CENTER));
JButton button = new JButton("Position Test");
panel.add(button);
frame.add(panel);
frame.pack();
frame.setVisible(true);
From Doing Without a Layout Manager
Although it is possible to do without a layout manager, you should use a layout manager if at all possible. A layout manager makes it easier to adjust to look-and-feel-dependent component appearances, to different font sizes, to a container's changing size, and to different locales.
The choice of layout manager will depend on how you wish to lay out the components.
See A Visual Guide to Layout Managers.
I'm working on a program and I want to create an app in which I can repeat the gui components using the for loop. I've done this using card layout and it works fine but when I use container and JPanel without card layout the gui components overlap on the previous components. Please give me a hint or advise where my code is wrong. Thanks for your advise and time in advance.
Here's the code of my app:
class form extends JFrame implements ActionListener {
JTextArea text;
static int openFrameCount = 0;
public form(){
super("Insert Form");
Container panel=getContentPane();
JPanel cc = new JPanel();
cc.setLayout(null);
for(int i=1;i<=2;i++){
JLabel label1=new JLabel(" Question"+(++openFrameCount));
label1.setBounds(15, 40, 185, 50);
cc.add(label1);
text=new JTextArea();
text.setLineWrap(true);
text.setWrapStyleWord(true);
text.setPreferredSize(new Dimension(750,50));
text.setBounds(80, 60,750,50);
cc.add(text);
JLabel symbol=new JLabel("Selection for Option?");
symbol.setBounds(100, 120,850,60);
cc.add(symbol);
ButtonGroup group = new ButtonGroup();
JRadioButton rbut=new JRadioButton("Radio Button for option");
rbut.setBounds(300, 120,300,60);
JCheckBox cbox=new JCheckBox("Check Box for option");
cc.add(rbut);
cbox.setBounds(650, 120,350,60);
cc.add(cbox);
group.add(rbut);
group.add(cbox);
cc.revalidate();
validate();
panel.add(cc);
}
}
You have set the layout of the cc panel to null, which is not a good idea. Then, using the setBounds(x, y, width, height) you set the location and size of the components that you add and they of course overlap.
Try to use any layout manager that fits your needs, but don't set it to null unless you really have a very strong reason to do that.
I have a JTextField, and right below it I want to show a JLabel placed in a JLayeredPane (I will use it for autosuggestions later on).
How can I place my JLabel in JLayeredPane right below the JTextField?
Here is some code I have, and the current result shown in the screenshot below:
public static void main(String[] args) {
JTextField field = new JTextField();
JLabel lbl = new JLabel("Hello");
lbl.setBackground(Color.YELLOW);
lbl.setOpaque(true);
JLayeredPane layeredPane = new JLayeredPane();
layeredPane.setLayout(new GridLayout(0,1));
layeredPane.add(lbl, (Integer) (JLayeredPane.POPUP_LAYER - 10));
layeredPane.setPreferredSize(field.getPreferredSize());
JPanel panel = new JPanel(new BorderLayout());
panel.add(field, BorderLayout.NORTH);
panel.add(layeredPane, BorderLayout.SOUTH);
JFrame frame = new JFrame();
frame.add(panel);
frame.setSize(200, 360);
frame.setVisible(true);
}
Second try:
public static void main(String[] args) {
JTextField field = new JTextField();
JLabel lbl = new JLabel("Hello");
lbl.setBackground(Color.YELLOW);
lbl.setOpaque(true);
lbl.setBounds(field.getBounds().x, field.getBounds().y,
field.getBounds().width, field.getBounds().height);
JPanel popPanel = new JPanel(new BorderLayout());
popPanel.add(lbl, BorderLayout.NORTH);
popPanel.setLocation(field.getLocation().x+10, field.getLocation().y+20);
popPanel.setPreferredSize(field.getPreferredSize());
JFrame frame = new JFrame();
JLayeredPane layeredPane = frame.getRootPane().getLayeredPane();
layeredPane.setLayout(new GridLayout(0,1));
layeredPane.add(popPanel, (Integer) (JLayeredPane.POPUP_LAYER - 10));
JPanel panel = new JPanel(new BorderLayout());
panel.add(field, BorderLayout.NORTH);
frame.add(panel);
frame.setSize(200, 360);
frame.setVisible(true);
}
Add the layeredPane to the "CENTER", not the SOUTH.
However, your understanding a layed pane seems to be a little confused. You use a layered pane when you want multiple components to be displayed on top (stacked?) of one another. You are still using the layered pane in 2 dimensions which is unnecessary. YOu can just use a panel for this.
If you want to popup a list of suggestions then you should just use a JPopupMenu and position it below the text field. Read the section from the Swing tutorial on Bringing up Popup Menus.
First of all, I don't think you should use a JLayeredPane for that, but just a permanent label.
If you do use a layered pane, you'll have to compute where the text field ends (y = field.getY() + field.getHeight()) and set your JPanel at 'panel.setLocation(0, y)' inside the JLayeredPane (provided the JLayeredPane has the same starting position as the underlying JFrame). You could equivalently position the JLayeredPane at (0, y) and put the label at (0, 0) within that layered pane.
You have to make sure this is done every time the components are resized.
why not using AutoComplete ComboBox / JTextField and if you don't want to display JComboBox, then there is AutoCompleted JTextField, and for somehow reduced autosuggestions, would be better look for undecorated JDialog/Window with JTable with one TableColum and without TableHeaded in the JScrollPane, just with plain RowSorter, very simle job