桥接模式

//视频文件
public interface VideoFile {
void decode(String fileName);
}

//avi文件
public class AVIFile implements VideoFile {
public void decode(String fileName) {
System.out.println("avi视频文件："+ fileName);
}
}

//rmvb文件
public class REVBBFile implements VideoFile {

public void decode(String fileName) {
    System.out.println("rmvb文件：" + fileName);
}

}

//操作系统版本
public abstract class OperatingSystemVersion {

protected VideoFile videoFile;

public OperatingSystemVersion(VideoFile videoFile) {
    this.videoFile = videoFile;
}

public abstract void play(String fileName);

}

//Windows版本
public class Windows extends OperatingSystem {

public Windows(VideoFile videoFile) {
    super(videoFile);
}

public void play(String fileName) {
    videoFile.decode(fileName);
}

}

//mac版本
public class Mac extends OperatingSystemVersion {

public Mac(VideoFile videoFile) {
    super(videoFile);
}

public void play(String fileName) {
	videoFile.decode(fileName);
}

}

//测试类
public class Client {
public static void main(String[] args) {
OperatingSystem os = new Windows(new AVIFile());
os.play("战狼3");
}
}