关于#eclipse#的问题，请各位专家解答！哪里写错了吗

问题遇到的现象和发生背景

Interface_Login_Enter报错 Logger.getLogger(Core.class)报错

问题相关代码，请勿粘贴截图

运行结果及报错内容

new了一个 myMain_Client
java.net.ConnectException: Connection refused: connect
连接失败
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.(Unknown Source)
at java.net.Socket.(Unknown Source)
at client.myMain_Client.(myMain_Client.java:20)
at client.myMain_Client.main(myMain_Client.java:34)

我的解答思路和尝试过的方法

我想要达到的结果

代码编写错误
1.看下接口Interface_xxxx 抽象方法是否没有实现完。
2.日志类获取LoggerFactory.getLogger(Class<?> clazz);