First, the time that something happens (in the AT column) is not necessarily the local wall clock time.

The time can be suffixed with ‘s’ (for “standard”) to mean local standard time (different from wall clock time when observing daylight saving time); or it can be suffixed with ‘g’, ‘u’, or ‘z’, all three of which mean the standard time at the prime meridan. ‘g’ stands for “GMT”; ‘u’ stands for “UT” or “UTC” (whichever was official at the time); ‘z’ stands for the nautical time zone Z (a.k.a. “Zulu” which, in turn, stands for ‘Z’). The time can also be suffixed with ‘w’ meaning “wall clock time;” but it usually isn’t because that’s the default.

Initializer
AtTime(Time time, String letter)
Attributes
letterSource Codeshared String letter
stringSource Codeshared actual String string

A developer-friendly string representing the instance. Concatenates the name of the concrete class of the instance with the hash of the instance. Subclasses are encouraged to refine this implementation to produce a more meaningful representation.

timeSource Codeshared Time time
Inherited Attributes
Attributes inherited from: Object
Methods
equalsSource Codeshared actual Boolean equals(Object other)

Determine if two values are equal.

For any two non-null objects x and y, x.equals(y) may be written as:

x == y 

Implementations should respect the constraints that:

  • if x===y then x==y (reflexivity),
  • if x==y then y==x (symmetry),
  • if x==y and y==z then x==z (transitivity).

Furthermore it is recommended that implementations ensure that if x==y then x and y have the same concrete class.

A class which explicitly refines equals() is said to support value equality, and the equality operator == is considered much more meaningful for such classes than for a class which simply inherits the default implementation of identity equality from Identifiable.

Note that an implementation of equals() that always returns false does satisfy the constraints given above. Therefore, in very rare cases where there is no reasonable definition of value equality for a class, for example, function references (Callable), it is acceptable for equals() to be defined to return false for every argument.

Refines Identifiable.equals ultimately refines Object.equals
Inherited Methods
Methods inherited from: Object