给我编写一个程序,利用javafx实现电视播放功能,至少有5个频道,电视没有打开的时候是黑屏显示。
时间: 2024-06-10 22:05:59 浏览: 14
好的,根据您的要求,以下是简单的JavaFX电视播放程序代码:
```
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
public class TVPlayer extends Application {
private ImageView tvImageView;
private Label channelNameLabel;
private final Image[] channelImages = {
new Image("https://via.placeholder.com/800x600.png?text=Channel+1"),
new Image("https://via.placeholder.com/800x600.png?text=Channel+2"),
new Image("https://via.placeholder.com/800x600.png?text=Channel+3"),
new Image("https://via.placeholder.com/800x600.png?text=Channel+4"),
new Image("https://via.placeholder.com/800x600.png?text=Channel+5")
};
private final String[] channelNames = {
"Channel 1",
"Channel 2",
"Channel 3",
"Channel 4",
"Channel 5"
};
private int currentChannel = -1;
@Override
public void start(Stage primaryStage) throws Exception {
BorderPane root = new BorderPane();
tvImageView = new ImageView();
tvImageView.setFitWidth(800);
tvImageView.setFitHeight(600);
tvImageView.setStyle("-fx-background-color: black;");
channelNameLabel = new Label(" ");
channelNameLabel.setStyle("-fx-font-size: 18px;");
Button prevChannelButton = new Button("Previous Channel");
prevChannelButton.setOnAction(e -> changeChannel(-1));
Button nextChannelButton = new Button("Next Channel");
nextChannelButton.setOnAction(e -> changeChannel(1));
HBox controlBox = new HBox(10, prevChannelButton, nextChannelButton);
controlBox.setAlignment(Pos.CENTER);
root.setCenter(tvImageView);
root.setBottom(controlBox);
root.setTop(channelNameLabel);
BorderPane.setAlignment(channelNameLabel, Pos.CENTER);
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.setTitle("TV Player");
primaryStage.show();
}
private void changeChannel(int increment) {
if (currentChannel == -1) {
tvImageView.setImage(channelImages[0]);
channelNameLabel.setText(channelNames[0]);
currentChannel = 0;
} else {
currentChannel += increment;
if (currentChannel < 0) {
currentChannel = channelImages.length - 1;
} else if (currentChannel >= channelImages.length) {
currentChannel = 0;
}
tvImageView.setImage(channelImages[currentChannel]);
channelNameLabel.setText(channelNames[currentChannel]);
}
}
public static void main(String[] args) {
launch(args);
}
}
```
这个程序包含了一个 `ImageView`,用于播放电视节目图片,以及一个 `Label`,显示当前频道名称。另外,程序还有两个按钮,用于切换到前一个或下一个频道。在 `changeChannel` 方法中,实现了对频道的切换,以及更新 `ImageView` 和 `Label` 的内容。
您可以自己替换 `channelImages` 和 `channelNames` 数组中的元素,以使用您自己的频道列表。同时,您也可以将 `ImageView` 的 `setImage` 方法替换为您自己的播放器方法,来实现真正的电视播放功能。
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