java InetAddress.getHostAddress() 是否符合 ipv6？
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InetAddress.getHostAddress() ipv6 compliant?
提问by Fakrudeen
Is InetAddress.getHostAddress()ipv6 compliant in JDK 1.6?
是 InetAddress.getHostAddress（）的IPv6兼容的JDK 1.6？
Specifically I am doing
具体我在做什么
InetAddress.getLocalHost().getHostAddress()
Is it ipv6 compliant? Does it work for both ipv4 and v6 addresses?
是否符合 ipv6？它对 ipv4 和 v6 地址都有效吗？
采纳答案by Fakrudeen
I looked at the code of InetAddress class and it is indeed doing the right thing.
我查看了 InetAddress 类的代码，它确实在做正确的事情。
if (isIPv6Supported()) {
o = InetAddress.loadImpl("Inet6AddressImpl");
}
else {
o = InetAddress.loadImpl("Inet4AddressImpl"); }
return (InetAddressImpl)o;
}
回答by Buhake Sindi
The extended class java.net.Inet6Addressis IPv6 compliant.
扩展类java.net.Inet6Address符合 IPv6。
JavaDoc:
Java文档：
This class represents an Internet Protocol version 6 (IPv6) address. Defined by RFC 2373: IP Version 6 Addressing Architecture.
此类表示 Internet 协议版本 6 (IPv6) 地址。由 RFC 2373 定义：IP 版本 6 寻址架构。
Basically, if you do InetAddress.getByName()or InetAddress.getByAddress()the methods identify whether the name or address is an IPv4 or IPv6 name/address and return an extended Inet4Address/Inet6Addressrespectively.
基本上，如果您这样做InetAddress.getByName()或InetAddress.getByAddress()方法识别名称或地址是 IPv4 还是 IPv6 名称/地址并分别返回扩展的Inet4Address/ Inet6Address。
As for InetAddress.getHostAddress(), it returns a null. You will need java.net.Inet6Address.getHostAddress()to return an IPv6 string representable address.
至于InetAddress.getHostAddress()，它返回一个null。您将需要java.net.Inet6Address.getHostAddress()返回一个可表示的 IPv6 字符串地址。
回答by Srinu Yarru
Here is the code to test based on the above analysis:
下面是基于以上分析进行测试的代码：
public static void main(String[] args) {
// TODO Auto-generated method stub
InetAddress localIP;
try {
localIP = InetAddress.getLocalHost();
if(localIP instanceof Inet6Address){
System.out.println("IPV6");
} else if (localIP instanceof Inet4Address) {
System.out.println("IPV4");
}
} catch (UnknownHostException e) {
e.printStackTrace();
}
}
