回答編集履歴
1
answer
CHANGED
@@ -17,7 +17,8 @@
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17
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// TODO Auto-generated catch block
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18
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e.printStackTrace();
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}
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20
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+
SwingUtilities.invokeLater(() ->
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20
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-
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21
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+
toucher.setBackground(Color.red));
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}
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}
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```
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