StackOverflow2013

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plurals

PO
primarykey
Id
6804749
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2011-07-24T03:24:08.337
FavoriteCount
0
LastActivityDate
2011-07-24T03:24:08.337
LastEditDate
LastEditorUserId
0
OwnerUserId
230513
ParentId
6803976
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
<p>The default behavior of <a href="http://download.oracle.com/javase/6/docs/api/javax/swing/JFormattedTextField.html" rel="nofollow"><code>JFormattedTextField</code></a> on <code>focusLost</code> is <code>COMMIT_OR_REVERT</code>, so one approach is to do the update <em>after</em> the focus listener has concluded. A <a href="http://en.wikipedia.org/wiki/Continuation-passing_style#Continuations_as_objects" rel="nofollow">continuation</a> works nicely, as shown below.</p> <pre><code>import java.awt.EventQueue; import java.awt.GridLayout; import java.awt.event.FocusAdapter; import java.awt.event.FocusEvent; import java.text.NumberFormat; import javax.swing.JFormattedTextField; import javax.swing.JFrame; import javax.swing.JPanel; /** @see http://stackoverflow.com/questions/6803976 */ public class Adder extends JPanel { private final NumberFormat format = NumberFormat.getNumberInstance(); private final JFormattedTextField a = new JFormattedTextField(format); private final JFormattedTextField b = new JFormattedTextField(format); private final JFormattedTextField sum = new JFormattedTextField(format); public Adder() { this.setLayout(new GridLayout(0, 1)); this.add(init(a)); this.add(init(b)); sum.setEditable(false); sum.setFocusable(false); this.add(sum); } private JFormattedTextField init(JFormattedTextField jtf) { jtf.setValue(0); jtf.addFocusListener(new FocusAdapter() { @Override public void focusLost(FocusEvent e) { EventQueue.invokeLater(new Runnable() { @Override public void run() { Number v1 = (Number) a.getValue(); Number v2 = (Number) b.getValue(); sum.setValue(v1.longValue() + v2.longValue()); } }); } }); return jtf; } private void display() { JFrame f = new JFrame("Adder"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(this); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new Adder().display(); } }); } } </code></pre>
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Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POFocusEvent doesn't get the last value of JFormattedTextField, How I can get it?
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  PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. UStrashgod
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PostsAcceptedAnswerId
1. This table or related slice is empty.
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1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
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1. This table or related slice is empty.

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