当前位置：首页 > Java

java 如何添加背景图片

2026-02-05 00:20:18Java

在 Swing 中添加背景图片

使用 JPanel 重写 paintComponent 方法绘制背景图片。确保在构造函数中加载图片资源，并通过 Graphics 对象绘制。

import javax.swing.*;
import java.awt.*;

public class BackgroundPanel extends JPanel {
    private Image backgroundImage;

    public BackgroundPanel(String imagePath) {
        try {
            backgroundImage = new ImageIcon(imagePath).getImage();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        if (backgroundImage != null) {
            g.drawImage(backgroundImage, 0, 0, getWidth(), getHeight(), this);
        }
    }
}

在 JavaFX 中添加背景图片

通过 BackgroundImage 类设置场景或布局的背景。需要指定图片路径、填充策略和位置参数。

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.scene.image.Image;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundImage;
import javafx.scene.layout.BackgroundPosition;
import javafx.scene.layout.BackgroundRepeat;
import javafx.scene.layout.BackgroundSize;

public class JavaFXBackground extends Application {
    @Override
    public void start(Stage primaryStage) {
        StackPane root = new StackPane();
        Image image = new Image("file:background.jpg");
        BackgroundImage bgImage = new BackgroundImage(
            image,
            BackgroundRepeat.NO_REPEAT,
            BackgroundRepeat.NO_REPEAT,
            BackgroundPosition.CENTER,
            new BackgroundSize(100, 100, true, true, true, true)
        );
        root.setBackground(new Background(bgImage));

        Scene scene = new Scene(root, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}