I use Eclipse Window Builder. When I click the button, something will be written on the screen. But since my prints are long, I want to use a scroll pane.
public
So, based on...
public class uyg1 extends JFrame {
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
uyg1 frame = new uyg1();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public uyg1() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
JTextArea textArea = new JTextArea("Test");
textArea.setSize(400, 400);
JScrollPane scroll = new JScrollPane(textArea, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
frame.getContentPane().add(scroll);
frame.setVisible(true);
}
}
textArea.setSize(400, 400);
is irrelevant as the layout manager will deal with it. You can provide sizing hints via the JTextArea(String, int, int)
constructer, but remember, this is the number of characters in width/height, not pixels.
The following are giving you issues...
frame.getContentPane().add(scroll);
frame.setVisible(true);
because frame
is undefined. Since the class extends from JFrame
, they are pointless, it should just be
getContentPane().add(scroll);
setVisible(true);
but, I'd add...
pack();
setLocationRelativeTo(null);
before it, as it will give you a generally better experience
You need to add the TextArea to the ScrollPane. Don't add the textarea tho the contentpane.