?? projector.java
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package headfirst.facade.hometheater;public class Projector { String description; DvdPlayer dvdPlayer; public Projector(String description, DvdPlayer dvdPlayer) { this.description = description; this.dvdPlayer = dvdPlayer; } public void on() { System.out.println(description + " on"); } public void off() { System.out.println(description + " off"); } public void wideScreenMode() { System.out.println(description + " in widescreen mode (16x9 aspect ratio)"); } public void tvMode() { System.out.println(description + " in tv mode (4x3 aspect ratio)"); } public String toString() { return description; }}?? 快捷鍵說(shuō)明
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