Java Lang

java.lang.Math
java.lang.System

Java Exceptions

ArithmeticException
IllegalFormatFlagsException

Java Utils

java.util.Objects

Java 8 Streams

java.util.stream.Collectors
java.util.stream.DoubleStream
java.util.stream.IntStream
java.util.stream.LongStream
java.util.stream.Stream
java.util.stream.StreamSupport

Java 8 Functional Interfaces

java.util.function.BiConsumer
java.util.function.BiFunction
java.util.function.BiPredicate
java.util.function.BinaryOperator
java.util.function.BooleanSupplier

Java Date Time

java.time.Clock
java.time.DayOfWeek
java.time.Duration
java.time.Instant
java.time.LocalDate
java.time.LocalDateTime
java.time.LocalTime
java.time.MonthDay
java.time.OffsetDateTime
java.time.OffsetTime
java.time.Period
java.time.Year
java.time.YearMonth
java.time.ZoneId
java.time.ZoneOffset
java.time.ZonedDateTime
java.time.temporal.ValueRange

Java IO & NIO

java.nio.file.Files

Java Collections

java.util.ArrayDeque
java.util.Arrays
java.util.Collections
java.util.Comparator
java.util.EnumSet
java.util.PriorityQueue
java.util.concurrent.ArrayBlockingQueue
java.util.concurrent.DelayQueue

Java Reflection

java.lang.Class
java.lang.reflect.Array
java.lang.reflect.Constructor
java.lang.reflect.Field
java.lang.reflect.Method