我试图让图片显示在JPanel中。这是我正在使用的代码:
URL imageURL;
BufferedImage image = null;
ImageIcon icon;
imageURL = getClass().getClassLoader().getResource("images/audiorpglogo.png");
if (imageURL == null) {
System.out.println(imageURL == null);
try { imageURL = new File("images/audiorpglogo.png").toURI().toURL(); }
catch (Exception e1) { imageURL = null; }
}
System.out.println(imageURL == null);
try { image = ImageIO.read(imageURL); }
catch (Exception e) { }
System.out.println(image == null);
icon = new ImageIcon(image);
System.out.println(icon == null);
logo = new JLabel(icon);
当我在Eclipse中运行此程序时,我得到以下输出:
true
false
false
false
但是,当我将程序导出为可运行的JAR时,我得到以下输出:
true
false
true
java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(ImageIcon.java:204)
at me.pogostick29.audiorpg.window.Window.<init>(Window.java:85)
at me.pogostick29.audiorpg.window.WindowManager.setup(WindowManager.java:16)
at me.pogostick29.audiorpg.AudioRPG.main(AudioRPG.java:30)
提前感谢您的帮助!
答案 0 :(得分:1)
你应该有一个资源文件夹,其中包含名为images
的文件夹,然后它应该有效。
示例:
我如何访问这些图标:
public BufferedImage icon32 = loadBufferedImage("/icon/icon32.png");
public BufferedImage icon64 = loadBufferedImage("/icon/icon64.png");
private BufferedImage loadBufferedImage(String string)
{
try
{
BufferedImage bi = ImageIO.read(this.getClass().getResource(string));
return bi;
} catch (IOException e)
{
e.printStackTrace();
}
return null;
}
答案 1 :(得分:0)
试试这段代码:
try {
InputStream in = getClass().getResource(imgName); //Read from an input stream
img = new ImageIcon(ImageIO.read(in));
}catch (Exception e1) {
e1.printStackTrace();
}