StackOverflow2013

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plurals

PO
primarykey
Id
19537183
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-10-23T08:55:13.180
FavoriteCount
0
LastActivityDate
2013-10-23T09:04:26.837
LastEditDate
2013-10-23T09:04:26.837
LastEditorUserId
2086065
OwnerUserId
2086065
ParentId
19536471
PostTypeId
2
Score
0
ViewCount
0
LastEditorDisplayName
text
Body
1, <code>A</code> extends <code>JFrame</code>. But the inner class <code>B</code> doesn't extend <code>JFrame</code>. 2, In both <code>A</code> and <code>B</code>'s constructors, you invoke <code>getContentPane()</code> to get a <code>ContentPane</code> object. Since <code>B</code> doesn't extends <code>JFrame</code> and it is an inner class of <code>A</code>. So actually <code>A</code> and <code>B</code> use the same <code>ContentPane</code> object to show something. 3, In <code>A</code>'s constructor, you have already added some components to it. And then in <code>B</code>'s constructor, you add a <code>JLabel</code> to the same <code>ContentPane</code> object. So all these components will be showed. It is not because the frame in <code>A</code> is not hiding. It is because the same <code>ContentPane</code> object is showed again. Solution: you can make <code>B</code> extends <code>JFrame</code>. In <code>A</code>'s constructor, line 26: <pre><code>rframe.setSize(500, 200); rframe.setLocationRelativeTo(null); cp = getContentPane(); cp.setLayout(null); setSize(550, 300); </code></pre> In <code>B</code>'s constructor, line line 74: <pre><code>frm.setSize(500, 200); frm.setLocationRelativeTo(null); cp = getContentPane(); cp.setLayout(null); setSize(550, 300); </code></pre> P.S. In your code, you will always create a new <code>JFrame</code> object and use it. There is no point for <code>A</code> or <code>B</code> to extends <code>JFrame</code>. Maybe it is better if you do the following changes. 1, In class <code>A</code>, do not create a new <code>JFrame</code> object, just use <code>A</code>, since it is also a <code>JFrame</code>. 2, In class <code>B</code>, use <code>cp = frm.getContentPane();</code> to get <code>ContentPane</code> from the <code>JFrame</code> you are actually using.
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1. This table or related slice is empty.
PostParentId
1. POOuter class jframe is not hiding when calling the inner class jframe
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 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USlonghua
UserOwnerUserId
1. USlonghua
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