?? tv.java
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package headfirst.command.party;public class TV { String location; int channel; public TV(String location) { this.location = location; } public void on() { System.out.println(location + " TV is on"); } public void off() { System.out.println(location + " TV is off"); } public void setInputChannel() { this.channel = 3; System.out.println(location + " TV channel is set for DVD"); }}?? 快捷鍵說明
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