两个事情

1. 路径看起来不对


2. Java本身不支持 ico 格式

1. The path looks wrong
2. Java doesn't, natively, support the ico format

看一下路径，路径中有引号

Take a look at the path, there is quote mark in the path

C:\\Users\\Aksi\\Documents\\NetBeansProjects\\test'\\src\\test\\Black_B.ico

确定它假设在那里