
public final class UndergroundSystem

Nested Classes
Modifier and Type	Class	Description

Fields
Modifier and Type	Field	Description

Constructors
Constructor	Description
`UndergroundSystem()`

Enum Constants
Enum Constant	Description

Modifier and Type	Method	Description
`final Unit`	`checkIn(Integer id, String stationName, Integer t)`
`final Unit`	`checkOut(Integer id, String stationName, Integer t)`
`final Double`	`getAverageTime(String startStation, String endStation)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 final Unit checkIn(Integer id, String stationName, Integer t)

 final Unit checkOut(Integer id, String stationName, Integer t)

 final Double getAverageTime(String startStation, String endStation)

Class UndergroundSystem