📄 chapter20n1.html
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<html><title>This is my first Applet</title><body bgcolor="ffffff"><p>Here is my first example of an applet,written in the Java programming language,to display a smiley face.<center><p><applet code="Chapter20n1.class" width=500 height=400></applet></center><p>If you click on the "Change" button,iit will change to a sad face;if you click on it again,it will change back to a happy face.That's all it does.<center><p><a href="http://www.lancs.ac.uk/">Click here when you've finished</a></center></body></html>⌨️ 快捷键说明
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