https://docs.oracle.com/javase/jp/18/docs/api/java.base/java/nio/channels/ServerSocketChannel.html
ServerSocketChannel (Java SE 18 & JDK 18)
declaration: module: java.base, package: java.nio.channels, class: ServerSocketChannel
java sejdk
https://docs.oracle.com/javase/jp/9/docs/api/java/nio/channels/ServerSocketChannel.html
ServerSocketChannel (Java SE 9 & JDK 9 )
java sejdk