java-10

问题 I have raised my concerns in the following thread: how i can get MD5 hash in jdk.7.o? and seen threads like: Cannot use Java 7 installation if Java 8 is installed and I have also studied: https://docs.oracle.com/cd/E74665_01/MOSHP/settings.htm#CIHEFHEF but no use. Since I am using JRE/JDK version > 10, I am unable to obtain MD5 from any keystore of my choice using keytools. It is said that MD5 can be obtained from the keystore, if my JRE version is 7. Also, I have tried and known that when

问题 So starting in Java 9, we can use var to declare local variables: var s = "cool"; is there a way to use a similar construct when declaring fields? class Container { final var s = "cool"; // does not compile tmk } doesn't seem like it from what I can tell. 回答1: is there a way to use a similar construct when declaring fields? No. According to JEP 286: Local-Variable Type Inference: This treatment would be restricted to local variables with initializers, indexes in the enhanced for-loop, and

问题 Does anyone know if there is a version of the Java 10 and JVM 10 specifications with diffs from the previous version available? For Java 8 and Java 9, there were specifications with diffs, and it's very difficult to see what exactly changed otherwise. 回答1: For differences between Java 9 and Java 10 (18.3), you can download " JSR-000383 Java SE 10 (18.3) Final Release Annex 3 for Evaluation " with the following link: http://download.oracle.com/otndocs/jcp/java_se-10-final-eval-spec/index.html

问题 Java 10 comes with the new Local Variable Type Inference. The token var can be used to reduce the boilerplate required when declaring a variable. e.g. var s = "hello"; According to What type of token is exactly "var" in Java 10? this new token is not a "keyword" but rather is a "reserved type name". As such the word "var" can still be used as a variable name which maintains backwards compatibility with existing code. var var = "you can do this"; When the "module" feature was introduced in

问题 Java 10 comes with the new Local Variable Type Inference. The token var can be used to reduce the boilerplate required when declaring a variable. e.g. var s = "hello"; According to What type of token is exactly "var" in Java 10? this new token is not a "keyword" but rather is a "reserved type name". As such the word "var" can still be used as a variable name which maintains backwards compatibility with existing code. var var = "you can do this"; When the "module" feature was introduced in

问题 Recently I installed the new version (2018.1) of IntelliJ IDEA, which added support for Java 10. But when I trying to use the var (for local variable type inference), I found there was no var in the code completion list. (See the screenshot below) If I continue typing, it will apply VarHandle as the first suggestion in that list. Then I have to undo that completion to restore var . I have checked project settings, I use JDK 10 and the language level is also set to 10. Code like var number = 1

问题 I am using Eclipse Oxygen .3a and using compliance with JDK Java SE-10.0.1 I am trying to use windows builder which worked with Oxygen and Java SE-9 on another computer, however, I can not get the IDE to open the "Design" tab. with this setup... I am also running JDK SE10 When I click on the design tab I get the following error: Eclipse is running under 0, but this Java project has a 9 Java compliance level, so WindowBuilder will not be able to load classes from this project. Use a lower

问题 I've installed apache-tomcat- 9.0.7 on my windows machine and have following environment configurations: echo %JAVA_HOME% C:\Program Files\Java\ jdk-10.0.1 echo %JRE_HOME% C:\Program Files\Java\ jre-10.0.1 OS : Windows 8 64-bit Eclipse Version: Oxygen.3a Release (4.7.3a) Whenever I run catlina.bat start from cmd , server runs fine on localhost But I'm not able to get the server instance up from eclipse's server configuration. Defined a new server in eclipse and added apache-tomact 9.0

问题 I am getting the error like "The type org.openqa.selenium.chrome.ChromeDriver is not accessible" for almost all the classes I am using in Selenium. It was working fine till I was using Java 8 but when I upgraded to Java 10 I am getting errors like this. See the screenshot of the project below: Edit 1: Selenium-server jar file also contains all the webdriver code as well. See the below image. It has the ChromeDriver class in the same package which I have imported in the above class. The same

问题 I on macOS 10.13.3 and I just update to java 10 and when I've tried to update R to it I just realize that I get two different outputs if I run R CMD javareconf with or without sudo . If I run with sudo it sticks to Java 9, but if I run without sudo it configures java 10. Without sudo : $ R CMD javareconf Java interpreter : /Library/Java/JavaVirtualMachines/jdk-10.jdk/Contents/Home/bin/java Java version : 10 Java home path : /Library/Java/JavaVirtualMachines/jdk-10.jdk/Contents/Home Java