Nullable<T>

public final class Nullable<T> extends Object

public static <T> Nullable<T> ofNull()

public static <T> Nullable<T> of(T value)

public static <T> Nullable<T> empty()

public static <T> Nullable<T> ofOptional(Optional<T> value)

public boolean isNull()

public boolean isEmpty()

public T get()

public <U> Nullable<U> map(Function<? super T,? extends U> mapper)

public boolean equals(Object other)