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Commit f2d7b5b

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More Java 11 examples
1 parent 4b92b43 commit f2d7b5b

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3 files changed

+74
-3
lines changed

3 files changed

+74
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‎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
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}
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private static void syncRequest() throws IOException, InterruptedException {
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var client = HttpClient.newHttpClient();
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var request = HttpRequest.newBuilder()
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.uri(URI.create("https://winterbe.com"))
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.build();
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var client = HttpClient.newHttpClient();
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HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
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System.out.println(response.body());
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}
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private static void asyncRequest() {
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var client = HttpClient.newHttpClient();
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var request = HttpRequest.newBuilder()
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.uri(URI.create("https://winterbe.com"))
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.build();
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var client = HttpClient.newHttpClient();
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client.sendAsync(request, HttpResponse.BodyHandlers.ofString())
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.thenApply(HttpResponse::body)
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.thenAccept(System.out::println);
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}
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private static void postData() throws IOException, InterruptedException {
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var client = HttpClient.newHttpClient();
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var request = HttpRequest.newBuilder()
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.uri(URI.create("https://postman-echo.com/post"))
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.timeout(Duration.ofSeconds(30))
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.version(HttpClient.Version.HTTP_2)
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.header("Content-Type", "text/plain")
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.POST(HttpRequest.BodyPublishers.ofString("Hi there!"))
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.build();
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var client = HttpClient.newHttpClient();
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var response = client.send(request, HttpResponse.BodyHandlers.ofString());
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System.out.println(response.statusCode()); // 200
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}
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private static void basicAuth() throws IOException, InterruptedException {
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var client = HttpClient.newHttpClient();
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var request1 = HttpRequest.newBuilder()
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.uri(URI.create("https://postman-echo.com/basic-auth"))
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.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 @@
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package com.winterbe.java11;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.util.List;
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import java.util.Map;
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import java.util.Optional;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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public class Misc {
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@Deprecated(forRemoval = true)
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String foo;
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public static void main(String[] args) throws IOException {
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collections();
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strings();
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optionals();
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inputStreams();
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streams();
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}
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private static void streams() {
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System.out.println(Stream.ofNullable(null).count()); // 0
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System.out.println(Stream.of(1, 2, 3, 2, 1)
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.dropWhile(n -> n < 3)
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.collect(Collectors.toList())); // [3, 2, 1]
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System.out.println(Stream.of(1, 2, 3, 2, 1)
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.takeWhile(n -> n < 3)
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.collect(Collectors.toList())); // [1, 2]
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}
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private static void inputStreams() throws IOException {
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var classLoader = ClassLoader.getSystemClassLoader();
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var inputStream = classLoader.getResourceAsStream("com/winterbe/java11/dummy.txt");
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var tempFile = File.createTempFile("dummy-copy", "txt");
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try (var outputStream = new FileOutputStream(tempFile)) {
40+
inputStream.transferTo(outputStream);
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}
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System.out.println(tempFile.length());
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}
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private static void optionals() {
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System.out.println(Optional.of("foo").orElseThrow()); // foo
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System.out.println(Optional.ofNullable(null).or(() -> Optional.of("bar")).get()); // bar
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System.out.println(Optional.of("foo").stream().count()); // 1
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}
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private static void strings() {
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System.out.println(" ".isBlank());
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System.out.println(" Foo Bar ".strip()); // "Foo Bar"
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System.out.println(" Foo Bar ".stripTrailing()); // " Foo Bar"
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System.out.println(" Foo Bar ".stripLeading()); // "Foo Bar "
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System.out.println("Java".repeat(3)); // "JavaJavaJava"
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System.out.println("A\nB\nC".lines().count()); // 3
58+
}
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private static void collections() {
61+
var list = List.of("A", "B", "C");
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var copy = List.copyOf(list);
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System.out.println(list == copy); // true
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var map = Map.of("A", 1, "B", 2);
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System.out.println(map);
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}
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}

‎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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