https://docs.oracle.com/javase/jp/11/docs/api/java.naming/javax/naming/InitialContext.html
InitialContext (Java SE 11 & JDK 11 )
java sejdk
https://www.ibm.com/docs/en/ibm-mq/9.3.x?topic=interfaces-initialcontext
InitialContext
An application uses an InitialContext object to create objects from object definitions that are retrieved from a repository of administered objects.