java-10 | 易学教程

javaFX program not working after changing the scene builder and jdk

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问题 My program worked perfectly before, And I changed my scene builder to gluon scene builder 10 from JavaFx scene builder 2.0 to add some CSS styling. I added the styling and the program showed errors like WARNING: Loading FXML document with JavaFX API of version 10.0.1 by JavaFX runtime of version 9.0.4 And then I updated my JDK to version 10.0.2 but it stii shows errors like this. Exception in Application start method java.lang.reflect.InvocationTargetException at java.base/jdk.internal

How to customise “host” header in Java http client

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问题 Here's my code: HttpClient client = HttpClient.newHttpClient(); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("http://127.0.0.1:8081/")) .header("Host", "test.example.com") .build(); client.send(request, HttpResponse.BodyHandlers.ofString()); As a result I see that the above code sends: GET / HTTP/1.1 Connection: Upgrade, HTTP2-Settings Content-Length: 0 Host: 127.0.0.1:8081 HTTP2-Settings: AAEAAEAAAAIAAAABAAMAAABkAAQBAAAAAAUAAEAA Upgrade: h2c User-Agent: Java-http-client/10

Why does array[idx++]+=“a” increase idx once in Java 8 but twice in Java 9 and 10?

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For a challenge, a fellow code golfer wrote the following code : import java.util.*; public class Main { public static void main(String[] args) { int size = 3; String[] array = new String[size]; Arrays.fill(array, ""); for(int i = 0; i <= 100; ) { array[i++%size] += i + " "; } for(String element: array) { System.out.println(element); } } } When running this code in Java 8, we get the following result: 1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94 97 100 2 5 8 11 14 17 20 23 26 29 32 35 38 41 44 47 50 53 56 59 62 65 68 71 74 77 80 83 86 89 92 95 98

How to set up java 10 in Eclipse Oxygen?

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I am not sure if latest version of eclipse i.e. Oxygen supports java 10 or not. I configured the JRE for java 10 from preferences on my mac machine. Also, I tried adding maven compiler plugin as below to my pom.xml:- <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>10</source> <target>10</target> <compilerVersion>10</compilerVersion> <fork>true</fork> <executable>/Library/Java/JavaVirtualMachines/jdk-10.jdk/Contents/Home</executable> </configuration> </plugin> I also tried after setting the Run Configurations as below:-

SimpleDateFormat with German Locale - Java 8 vs Java 10+

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问题 I have code and a test-case in a legacy application, which can be summarized as follows: @Test public void testParseDate() throws ParseException { String toParse = "Mo Aug 18 11:25:26 MESZ +0200 2014"; String pattern = "EEE MMM dd HH:mm:ss z Z yyyy"; DateFormat dateFormatter = new SimpleDateFormat(pattern, Locale.GERMANY); Date date = dateFormatter.parse(toParse); //skipped assumptions } This test passes in Java 8 and below. However with Java 10 upwards this leads to a java.text

Java 10: Will Java 7's Diamond Inference Work with Local Type Inference?

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问题 From JEP 286, we see that we'll be able to utilize local type inference ( var ) in JDK 10 (18.3). The JEP states that the following compiles, which is expected: var list = new ArrayList<String>(); // infers ArrayList<String> I'm curious to know what would happen if we attempt the following: var list = new ArrayList<>(); Will what I proposed in the second snippet even compile? If so (which I doubt), would the ArrayList accept Object as its generic type? I'd try this myself, but I don't have

Eclipse can't find XML related classes after switching build path to JDK 10

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I'm developing on a Maven project (branch platform-bom_brussels-sr7) in Eclipse. When I recently tried switching the Java Build Path for the project to JDK 10, Eclipse build can no longer find classes such as javax.xml.xpath.XPath , org.w3c.dom.Document , or org.xml.sax.SAXException . It seems only XML related classes are impacted, mostly from the Maven dependency xml-apis-1.4.01 . Trying a Maven build from Eclipse works without errors. Ctrl-LeftClick on one of the supposedly missing classes finds the class and opens it in the Eclipse editor. It seems only the Eclipse build is impacted. I

Can Java 10 compiled classes run on 9? [duplicate]

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问题 This question already has answers here : Can Java 8 code be compiled to run on Java 7 JVM? (5 answers) List of Java class file format major version numbers? (4 answers) Closed last year . If I understand correctly the binary form of Java 10 is 100% identical to Java 9 so it shouldn't make any problems. Is my assumption correct? 回答1: This has nothing to do with Java 10; the rules are the same as they've always been. In every version of Java, the classfile version number has been incremented.

Why does array[idx++]+=“a” increase idx once in Java 8 but twice in Java 9 and 10?

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问题 For a challenge, a fellow code golfer wrote the following code: import java.util.*; public class Main { public static void main(String[] args) { int size = 3; String[] array = new String[size]; Arrays.fill(array, ""); for(int i = 0; i <= 100; ) { array[i++%size] += i + " "; } for(String element: array) { System.out.println(element); } } } When running this code in Java 8, we get the following result: 1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85 88 91 94

Migrate Jersey project to use Java 10 results in java.lang.IllegalArgumentException at jersey.repackaged.org.objectweb.asm.ClassReader.<init>

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问题 Previously project is on Tomcat 8 and JDK 8 it was Working Fine But when i migrated my project on Tomcat 9 and JDK 10 it is giving me error as follows : Oct 05, 2018 11:02:01 AM org.apache.catalina.core.ApplicationContext log SEVERE: StandardWrapper.Throwable java.lang.IllegalArgumentException at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:170) at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:153) at jersey.repackaged.org.objectweb.asm