📄 about.java
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import javax.microedition.lcdui.*;public class About extends Alert implements CommandListener { private static Displayable instance; synchronized public static Displayable getInstance() { if (instance == null) { instance = new About(); } return instance; } private About() { super("版权声明"); String play = " 齐鲁大学生软件设计大赛参赛作品\n\n"; String author = " YTX设计团队\n"; String edition = " 版本: V1.5\n\n"; setString(play + author + edition); setType(AlertType.INFO); setTimeout(Alert.FOREVER); addCommand(new Command("返回", Command.BACK, 1)); setCommandListener(this); } public void commandAction(Command c, Displayable s) { Navigator.flow(c.getLabel()); }}
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