Как запускать GUI в JAVA?

Орхан Гасанлы,

Connection refused: connect
at java.base/sun.nio.ch.Net.connect0(Native Method)
at java.base/sun.nio.ch.Net.connect(Net.java:579)
at java.base/sun.nio.ch.Net.connect(Net.java:568)
at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:588)
at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)
at java.base/java.net.Socket.connect(Socket.java:633)
at java.base/java.net.Socket.connect(Socket.java:583)
at java.base/java.net.Socket.(Socket.java:507)
at java.base/java.net.Socket.(Socket.java:287)
at Main.connectToServer(Main.java:58)
at Main.main(Main.java:12)

Получаю такую кипу ошибок