您的图像文件需要与运行图像文件位于同一目录中来自。

Your image file needs to be in the same directory as you are running the application from.

如果它实际上与拨打电话的班级在同一目录中，那么你可以使用：

If its actually in the same directory as the class making the call then you can use:

searchIcon = new ImageIcon( getClass().getResource("searchIcon.png") );

如果它位于某个任意位置，那么您需要指定完整路径。

If it is in some arbitrary location then you will need to specify the full path.