到sun的官方网站上下载吧下面是链接地址复制到迅雷或BT新建下载就可以了http://192.18.108.136/ECom/EComTicketServlet/BEGIN703509E3AFC648346FE91CC0FE95737B/-2147483648/1520957007/1/531806/531794/1520957007/2ts+/westCoastFSEND/jdk-1.5.0-doc-oth-JPR/jdk-1.5.0-doc-oth-JPR:1/jdk-1_5_0-doc.zip好好学习java还是很好用的