Java – How to set java.net.preferIPv4Stack=true at runtime

broadcastipv4ipv6java

I need to disable IPv6. For that the java documentation indicates setting jvm property java.net.preferIPv4Stack=true.

But I don't understand how to do it from the code itself.

Many forums demonstrated doing it from the command prompt, but I need to do it at runtime.

Best Solution

You can use System.setProperty("java.net.preferIPv4Stack" , "true");

This is equivalent to passing it in the command line via -Djava.net.preferIPv4Stack=true