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java8-tutorial/src/com/winterbe/java8/Optional1.java at master · alex-zhh/java8-tutorial · GitHub
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java8-tutorial
/
src
/
com
/
winterbe
/
java8
/
Optional1.java
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java8-tutorial
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src
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com
/
winterbe
/
java8
/
Optional1.java
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package
com
.
winterbe
.
java8
;
import
java
.
util
.
Optional
;
/**
* @author Benjamin Winterberg
*/
public
class
Optional1
{
public
static
void
main
(
String
[]
args
) {
Optional
<
String
>
optional
=
Optional
.
of
(
"bam"
);
optional
.
isPresent
();
// true
optional
.
get
();
// "bam"
optional
.
orElse
(
"fallback"
);
// "bam"
optional
.
ifPresent
((
s
) ->
System
.
out
.
println
(
s
.
charAt
(
0
)));
// "b"
}
}
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