I use netbeans. I want add only one item but it add multiple times. When I push button, JList
is like this:
item1
item2
item2
item3
item3
item3
private void jAddItemActionPerformed(java.awt.event.ActionEvent evt) {
frame.setSize(200, 300);
jList.setModel(listmodel);
textarea.setSize(100, 50);
textarea.setLocation(50, 20);
frame.add(textarea);
addButton.setSize(100,50);
addButton.setLocation(50, 150);
frame.add(addButton);
frame.setVisible(true);
addButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
listmodel.addElement(textarea.getText(););
frame.dispose();
}
});
textarea.setText("");
}
I guess you should call:
listmodel.set(0, textarea.getText())
instead of addElement.
And somewhere before have this call (once):
listmodel.setSize(1)
I guess GUI code generation with Netbeans is good only for simple projects.
Nevertheless please read http://www.sscce.org/ .
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