Certainly! It looks like you're implementing the Builder pattern for your `VideoPlayer` class. The Builder pattern is useful when you have complex objects that require many parameters, some of which may be optional. Here's how you can complete the `VideoPlayer` class and its `Builder`: ```java public interface VideoPlayerInterface { void showMenu(); void showPlaylist(); void showMainWindow(); void showControlBar(); void showFavoriteList(); } public class VideoPlayer implements VideoPlayerInterface { private boolean hasMenu; private boolean hasPlaylist; private boolean hasMainWindow; private boolean hasControlBar; private boolean hasFavoriteList; // Private constructor, only accessible through the Builder private VideoPlayer(Builder builder) { this.hasMenu = builder.hasMenu; this.hasPlaylist = builder.hasPlaylist; this.hasMainWindow = builder.hasMainWindow; this.hasControlBar = builder.hasControlBar; this.hasFavoriteList = builder.hasFavoriteList; } @Override public void showMenu() { if (hasMenu) { System.out.println("Showing Menu"); } else { System.out.println("Menu is not available"); } } @Override public void showPlaylist() { if (hasPlaylist) { System.out.println("Showing Playlist"); } else { System.out.println("Playlist is not available"); } } @Override public void showMainWindow() { if (hasMainWindow) { System.out.println("Showing Main Window"); } else { System.out.println("Main Window is not available"); } } @Override public void showControlBar() { if (hasControlBar) { System.out.println("Showing Control Bar"); } else { System.out.println("Control Bar is not available"); } } @Override public void showFavoriteList() { if (hasFavoriteList) { System.out.println("Showing Favorite List"); } else { System.out.println("Favorite List is not available"); } } // Static inner class to act as the Builder public static class Builder { private boolean hasMenu; private boolean hasPlaylist; private boolean hasMainWindow; private boolean hasControlBar; private boolean hasFavoriteList; public Builder() { // Default values can be set here if needed } public Builder withMenu(boolean hasMenu) { this.hasMenu = hasMenu; return this; } public Builder withPlaylist(boolean hasPlaylist) { this.hasPlaylist = hasPlaylist; return this; } public Builder withMainWindow(boolean hasMainWindow) { this.hasMainWindow = hasMainWindow; return this; } public Builder withControlBar(boolean hasControlBar) { this.hasControlBar = hasControlBar; return this; } public Builder withFavoriteList(boolean hasFavoriteList) { this.hasFavoriteList = hasFavoriteList; return this; } public VideoPlayer build() { return new VideoPlayer(this); } } } ``` Usage Example Here's how you can use the `Builder` to create a `VideoPlayer` instance: ```java public class Main { public static void main(String[] args) { VideoPlayer videoPlayer = new VideoPlayer.Builder() .withMenu(true) .withPlaylist(true) .withMainWindow(true) .withControlBar(true) .withFavoriteList(true) .build(); videoPlayer.showMenu(); videoPlayer.showPlaylist(); videoPlayer.showMainWindow(); videoPlayer.showControlBar(); videoPlayer.showFavoriteList(); } } ``` This code will output: ``` Showing Menu Showing Playlist Showing Main Window Showing Control Bar Showing Favorite List ``` If any of the components are set to `false`, the corresponding method will output that the component is not available. [2024-11-15 20:58:18 | AI写代码神器 | 828点数解答]