Java网络编程 所有连入Internet的终端设备(包括计算机、PDA、打印机以及其他的电子设备)都有一个唯一的索引，这个索引被称为IP地址。-Java network programming for all terminal equipment connected to the Internet (including computer, PDA, printers and other electronic equipment) has a unique index, the index is called IP address.