public class Optional<T>
extends java.lang.Object
Modifier and Type | Field and Description |
---|---|
private static Optional |
Empty |
private boolean |
set |
private T |
value |
Modifier | Constructor and Description |
---|---|
private |
Optional() |
private |
Optional(T val) |
Modifier and Type | Method and Description |
---|---|
static <T> Optional<T> |
empty() |
T |
getValue() |
boolean |
isSet() |
static <T> Optional<T> |
of(T value) |
void |
then(UnaryProcedure<T> func) |
private final T value
private final boolean set
private static final Optional Empty
private Optional(T val)
private Optional()
public boolean isSet()
public T getValue()
public void then(UnaryProcedure<T> func)
public static <T> Optional<T> of(T value)
public static <T> Optional<T> empty()