System.out.println(this.getClass().getResource("/img/down.png").getPath());为什么输出是:
/C:/Documents%20and%20Settings/Administrator/workspace/Domino/bin/img/down.png
而不是
File:/C:/Documents%20and%20Settings/Administrator/workspace/Domino/bin/img/down.png导致每次都用不了文件.