As you can see on below screenshots, eclipse and Android SDK Manager (and other Java programs) are trying to connect to a IPv4 Internet IP via IPv6 TCP/IP stack while Proxifier (a proxy manager program, nevermind) can not support that.
正如您在下面的屏幕截图中看到的那样，eclipse和Android SDK Manager（以及其他Java程序）正在尝试通过IPv6 TCP / IP堆栈连接到IPv4 Internet IP，而Proxifier（代理管理器程序，无所谓）不能支持它。
How I can disable IPv6 in Java?
如何在Java中禁用IPv6？
3 个解决方案
#1
78
I wanted to use this for some program I hadn't control for running that Java app so ended with this _JAVA_OPTIONS=-Djava.net.preferIPv4Stack=true environment variable. (read about _JAVA_OPTIONS here)
我想将这个用于我无法控制运行该Java应用程序的程序，因此以_JAVA_OPTIONS = -Djava.net.preferIPv4Stack = true环境变量结束。 （在这里阅读_JAVA_OPTIONS）
If you are using Windows, just run this command on Windows cmd:setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true
如果您使用的是Windows，只需在Windows cmd上运行此命令：setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack = true
Thanks to Jason Nichols for reminding this JVM argument :)
感谢Jason Nichols提醒这个JVM参数:)
#2
34
Did you try (from the command line)
你试过（从命令行）
-Djava.net.preferIPv4Stack=true
or (from your code)
或（来自您的代码）
System.setProperty("java.net.preferIPv4Stack" , "true");
#3
2
Maybe a bit late but for me neither solution worked. So I included this option as it is stated here:
也许有点晚了，但对我来说，这两种解决方所以我在这里说明了这个选项：
-Djava.net.preferIPv4Addresses=true
But also the followingI added line to the end of the file /etc/sysctl.conf
但是下面我还在文件/etc/sysctl.conf的末尾添加了一行
net.ipv6.conf.all.disable_ipv6 = 1
And
和
sudo sysctl -p
as it is explained here. In order to check that ipv6 is disabled just execute:
正如这里解释的那样。为了检查ipv6是否被禁用，只需执行：
ip a | grep inet
#1
78
I wanted to use this for some program I hadn't control for running that Java app so ended with this _JAVA_OPTIONS=-Djava.net.preferIPv4Stack=true environment variable. (read about _JAVA_OPTIONS here)
我想将这个用于我无法控制运行该Java应用程序的程序，因此以_JAVA_OPTIONS = -Djava.net.preferIPv4Stack = true环境变量结束。 （在这里阅读_JAVA_OPTIONS）
If you are using Windows, just run this command on Windows cmd:setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true
如果您使用的是Windows，只需在Windows cmd上运行此命令：setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack = true
Thanks to Jason Nichols for reminding this JVM argument :)
感谢Jason Nichols提醒这个JVM参数:)
#2
34
Did you try (from the command line)
你试过（从命令行）
-Djava.net.preferIPv4Stack=true
or (from your code)
或（来自您的代码）
System.setProperty("java.net.preferIPv4Stack" , "true");
#3
2
Maybe a bit late but for me neither solution worked. So I included this option as it is stated here:
也许有点晚了，但对我来说，这两种解决方所以我在这里说明了这个选项：
-Djava.net.preferIPv4Addresses=true
But also the followingI added line to the end of the file /etc/sysctl.conf
但是下面我还在文件/etc/sysctl.conf的末尾添加了一行
net.ipv6.conf.all.disable_ipv6 = 1
And
和
sudo sysctl -p
as it is explained here. In order to check that ipv6 is disabled just execute:
正如这里解释的那样。为了检查ipv6是否被禁用，只需执行：
ip a | grep inet