easy question

[koko]

how can I create a program that prompts a user to enter a number into a
textfield and when they click a button they create that many more
textfields?

 

[Jeroen V.]

how can I create a program that prompts a user to enter a number into a
textfield and when they click a button they create that many more
textfields?

The question is the answer...

Prob some homework?

Have a look at http://java.sun.com/docs/books/tutorial/uiswing/index.html

for(int i = 0; i < userInput; i++){
container.add(new JTextField());
}

 

[Mark Thomas]

The question is the answer...

Prob some homework?

Have a look at http://java.sun.com/docs/books/tutorial/uiswing/index.html

for(int i = 0; i < userInput; i++){
container.add(new JTextField());
}

What would you do to cause a repaint with the new components at this
point?

Mark

 

[Jeffrey Schwab]

What would you do to cause a repaint with the new components at this
point?

pack()

 

[Jeroen V.]

What would you do to cause a repaint with the new components at this

point?

....

container =
someFrameYouHaveToCreateAndConfigureBeforeLikeInTheJavaSwingTutorial.getRootPane();

 

[Mark Thomas]

pack()

Would validate() be the way?

Mark

 

[koko]

thanks and yes it is hw... however, i am getting an error stating my
container cannot be resolved. not sure how to fix that. thanks for
the link - lots of good info.

 

[Jeffrey Schwab]

Would validate() be the way?

Depends what you want to do. If you call invalidate()/validate(), the
components will be laid out anew within their container, but the frame
won't be resized. At the risk of robbing "koko" of a proper education:


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class TextRabbit {

private JFrame frame = createFrame();

private JTextField createTextField() {
final JTextField field = new JTextField();
field.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
int i = Integer.parseInt(field.getText());
while(--i >= 0) {
frame.add(createTextField());
}

} catch(NumberFormatException x) {
System.err.println("Exiting not-so-gracefully.");
System.exit(1);
}

frame.pack();

/* If you use in/validate() instead of pack(), you'll
* have to resize the frame manually to see the new
* text fields. */

// frame.invalidate();
// frame.validate();
}
});
return field;
}

private JFrame createFrame() {
JFrame frame = new JFrame("Text Rabbit");
frame.setContentPane(Box.createVerticalBox());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(createTextField());
frame.pack();
return frame;
}

public void setVisible(boolean b) {
frame.setVisible(b);
}

public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new TextRabbit().setVisible(true);
}
});
}
}

 

[Alan Krueger]

At the risk of robbing "koko" of a proper education: [...]
class TextRabbit {

Since this was Koko, you should have named it FuzzyKitten or something.

 

[Jeroen V.]

thanks and yes it is hw... however, i am getting an error stating my
container cannot be resolved. not sure how to fix that. thanks for
the link - lots of good info.

I meant frame.getContentPane()