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RCA.java
文章插图
public class RCA implements TV {@Overridepublic void on() {System.out.println("RCA被打开了");}@Overridepublic void off() {System.out.println("RCA被关闭了");}@Overridepublic void tuneChannel(int channel) {System.out.println("切换到第" + channel + "频道了");}}- 1
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