>>176
うちだと動くよ。

%uname -a
FreeBSD home.dangan.local 5.4-RELEASE-p7 FreeBSD 5.4-RELEASE-p7 #1: Thu Oct 27 17:40:13 JST 2005 root@******:/usr/obj/usr/src/sys/******* i386
%cat test.java
import java.net.*;

public class test {
public static void main(String[] args) throws Exception {
System.setProperty( "java.net.preferIPv6Addresses", "true" );
InetAddress addresses[] = InetAddress.getAllByName("localhost");
for( int i = 0 ;i < addresses.length ; i++){
System.out.println(addresses[i]);
}
}
}
%javac test.java
%java -showversion test
java version "1.4.2-p7"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-p7-root_12_sep_2005_03_09)
Java HotSpot(TM) Client VM (build 1.4.2-p7-root_12_sep_2005_03_09, mixed mode)

localhost/0:0:0:0:0:0:0:1
localhost/127.0.0.1