# Java 程序：獲取 IP 地址 > 原文： [https://beginnersbook.com/2014/07/java-program-to-get-ip-address/](https://beginnersbook.com/2014/07/java-program-to-get-ip-address/) 在這個例子中，我們將看到如何獲得系統的 IP 地址。步驟如下： 1）通過調用`InetAddress`類的`getLocalHost()`方法獲取本地主機地址。 2）通過調用`getHostAddress()`方法獲取 IP 地址。 ```java import java.net.InetAddress; class GetMyIPAddress { public static void main(String args[]) throws Exception { /* public static InetAddress getLocalHost() * throws UnknownHostException: Returns the address * of the local host. This is achieved by retrieving * the name of the host from the system, then resolving * that name into an InetAddress. Note: The resolved * address may be cached for a short period of time. */ InetAddress myIP=InetAddress.getLocalHost(); /* public String getHostAddress(): Returns the IP * address string in textual presentation. */ System.out.println("My IP Address is:"); System.out.println(myIP.getHostAddress()); } } ``` **輸出：** ```java My IP Address is: 115.242.7.243 ``` **參考：** [`InetAddress` javadoc](https://docs.oracle.com/javase/7/docs/api/java/net/InetAddress.html)