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Commitf2d7b5b

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More Java 11 examples
1 parent4b92b43 commitf2d7b5b

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3 files changed

+74
-3
lines changed

3 files changed

+74
-3
lines changed

‎src/com/winterbe/java11/HttpClientExamples.java

Lines changed: 4 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -19,39 +19,40 @@ public static void main(String[] args) throws IOException, InterruptedException
1919
}
2020

2121
privatestaticvoidsyncRequest()throwsIOException,InterruptedException {
22-
varclient =HttpClient.newHttpClient();
2322
varrequest =HttpRequest.newBuilder()
2423
.uri(URI.create("https://winterbe.com"))
2524
.build();
25+
varclient =HttpClient.newHttpClient();
2626
HttpResponse<String>response =client.send(request,HttpResponse.BodyHandlers.ofString());
2727
System.out.println(response.body());
2828
}
2929

3030
privatestaticvoidasyncRequest() {
31-
varclient =HttpClient.newHttpClient();
3231
varrequest =HttpRequest.newBuilder()
3332
.uri(URI.create("https://winterbe.com"))
3433
.build();
34+
varclient =HttpClient.newHttpClient();
3535
client.sendAsync(request,HttpResponse.BodyHandlers.ofString())
3636
.thenApply(HttpResponse::body)
3737
.thenAccept(System.out::println);
3838
}
3939

4040
privatestaticvoidpostData()throwsIOException,InterruptedException {
41-
varclient =HttpClient.newHttpClient();
4241
varrequest =HttpRequest.newBuilder()
4342
.uri(URI.create("https://postman-echo.com/post"))
4443
.timeout(Duration.ofSeconds(30))
4544
.version(HttpClient.Version.HTTP_2)
4645
.header("Content-Type","text/plain")
4746
.POST(HttpRequest.BodyPublishers.ofString("Hi there!"))
4847
.build();
48+
varclient =HttpClient.newHttpClient();
4949
varresponse =client.send(request,HttpResponse.BodyHandlers.ofString());
5050
System.out.println(response.statusCode());// 200
5151
}
5252

5353
privatestaticvoidbasicAuth()throwsIOException,InterruptedException {
5454
varclient =HttpClient.newHttpClient();
55+
5556
varrequest1 =HttpRequest.newBuilder()
5657
.uri(URI.create("https://postman-echo.com/basic-auth"))
5758
.build();

‎src/com/winterbe/java11/Misc.java

Lines changed: 69 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,69 @@
1+
packagecom.winterbe.java11;
2+
3+
importjava.io.File;
4+
importjava.io.FileOutputStream;
5+
importjava.io.IOException;
6+
importjava.util.List;
7+
importjava.util.Map;
8+
importjava.util.Optional;
9+
importjava.util.stream.Collectors;
10+
importjava.util.stream.Stream;
11+
12+
publicclassMisc {
13+
14+
@Deprecated(forRemoval =true)
15+
Stringfoo;
16+
17+
publicstaticvoidmain(String[]args)throwsIOException {
18+
collections();
19+
strings();
20+
optionals();
21+
inputStreams();
22+
streams();
23+
}
24+
25+
privatestaticvoidstreams() {
26+
System.out.println(Stream.ofNullable(null).count());// 0
27+
System.out.println(Stream.of(1,2,3,2,1)
28+
.dropWhile(n ->n <3)
29+
.collect(Collectors.toList()));// [3, 2, 1]
30+
System.out.println(Stream.of(1,2,3,2,1)
31+
.takeWhile(n ->n <3)
32+
.collect(Collectors.toList()));// [1, 2]
33+
}
34+
35+
privatestaticvoidinputStreams()throwsIOException {
36+
varclassLoader =ClassLoader.getSystemClassLoader();
37+
varinputStream =classLoader.getResourceAsStream("com/winterbe/java11/dummy.txt");
38+
vartempFile =File.createTempFile("dummy-copy","txt");
39+
try (varoutputStream =newFileOutputStream(tempFile)) {
40+
inputStream.transferTo(outputStream);
41+
}
42+
System.out.println(tempFile.length());
43+
}
44+
45+
privatestaticvoidoptionals() {
46+
System.out.println(Optional.of("foo").orElseThrow());// foo
47+
System.out.println(Optional.ofNullable(null).or(() ->Optional.of("bar")).get());// bar
48+
System.out.println(Optional.of("foo").stream().count());// 1
49+
}
50+
51+
privatestaticvoidstrings() {
52+
System.out.println(" ".isBlank());
53+
System.out.println(" Foo Bar ".strip());// "Foo Bar"
54+
System.out.println(" Foo Bar ".stripTrailing());// " Foo Bar"
55+
System.out.println(" Foo Bar ".stripLeading());// "Foo Bar "
56+
System.out.println("Java".repeat(3));// "JavaJavaJava"
57+
System.out.println("A\nB\nC".lines().count());// 3
58+
}
59+
60+
privatestaticvoidcollections() {
61+
varlist =List.of("A","B","C");
62+
varcopy =List.copyOf(list);
63+
System.out.println(list ==copy);// true
64+
65+
varmap =Map.of("A",1,"B",2);
66+
System.out.println(map);
67+
}
68+
69+
}

‎src/com/winterbe/java11/dummy.txt

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1 @@
1+
Foobar

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