Question

制作变量，将图像加载到变量中，并要求paintComponent在我的JPanel中显示图像。我看不出自己的错误。

public class Main extends JFrame {

    public static void main(String[] args) {
        JFrame frame = new Main();
        frame.setSize(1524, 715);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setTitle("Animatieproject Stijn Mannaerts: Free Kick");
        frame.setContentPane(new Voetbalveld());
        frame.setVisible(true);
        frame.setLocationRelativeTo(null);
    }
}

class Voetbalveld extends JPanel {

    private ImageIcon afbIntro;

    public Voetbalveld() {

        afbIntro = new ImageIcon("scr/afbeeldingen/Intro.jpg");

    }

    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        afbIntro.paintIcon(null, g, 0, 0);

    }
}

Answer 1

这不是绘画的方式。为什么不使用Graphics.drawImage（）呢？查看本教程：http://docs.oracle.com/javase/tutorial/uiswing/painting/

Answer 2

您的代码似乎对我而言。确保您不希望src代替scr。接下来，如果您的图像文件夹位于项目的源文件夹中，那么您可能想尝试这样做：

afbIntro = new ImageIcon(Voetbalveld.class.getResourceAsStream("scr/afbeeldingen/Intro.jpg"));

或

afbIntro = new ImageIcon(Voetbalveld.class.getResourceAsStream("afbeeldingen/Intro.jpg"));

取决于您的文件结构。第二个示例中的路径需要相对于文件Main.java。

Answer 3

框架类

    import javax.swing.JFrame;

    public class Main
    {
        public static void main(String[] args)
        {
        Jframe frame = new JFrame("Animatieproject Stijn Mannaerts: Free Kick");
        frame.setSize(1524, 715);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(new Voetbalveld());
        frame.setVisible(true);
        }
    }

小组类

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

    public class Voetbalveld extends JPanel
    {
        public void paintComponent(Graphics g)
        {    
        ImageIcon afbIntro = new ImageIcon("scr/afbeeldingen/Intro.jpg");
        /*The following are two methods for image sizing,
         *Use the one that best fits your code:
         *
         *g.drawImage(afbIntro.getImage(), x, y, null); 
         *Fill in the arguments for x and y to locate your upper left corner
         *The image will be in it's original size with the designated upper left corner
         *
         *g.drawImage(afbIntro.getImage(), x, y, w, h, null);
         *Fill in the arguments for w and h to set the width and height of your image
         *The image will be in it's scaled size (w and h) and starting at the 
         *designated upper left corner (x and y)
         */
        }
    }

Answer 4

你拼写src错了。你有scr。

"scr/afbeeldingen/Intro.jpg"

修复

不在java项目中显示的背景图像

4 个答案: