title: How can I disable IPv6 stack use for IPv4 IPs on JRE?
body: <p>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.</p>
  
  <p><img src="https://i.stack.imgur.com/4uYC0.png" alt="Eclipse failure in connecting to the Internet"><img src="https://i.stack.imgur.com/CvPnM.png" alt="Android SDK Manager failure in connecting to the Internet"></p>
  
  <p>How I can disable IPv6 in Java?</p>