java-13

问题 I am using eclipse 09-2019 with jdk13 and selenium 3.0.1 .jar file. My Code is: package package1; import org.openqa.selenium.WebDriver; import org.openqa.selenium.chrome.ChromeDriver; import org.openqa.selenium.firefox.FirefoxDriver; public class Script1 { public static void main(String[] args) { System.out.println("Hii"); System.setProperty("Webdriver.chrome.driver","E:\\Selenium\\chromedriver.exe"); WebDriver driver=new ChromeDriver(); driver.get("http://www.google.com"); } } Error: java

问题 Accidentally I have stumbled into a change in jdk-15 that I was not aware of. Suppose I have a very simple question: what is the size of an array of 3 intergers? For this, I use JOL. The code is fairly trivial: import org.openjdk.jol.info.ClassLayout; import org.openjdk.jol.vm.VM; public class Array { public static void main(String [] args){ int [] array = new int[3]; System.out.println(ClassLayout.parseInstance(array).toPrintable()); } } I run this with jdk-13 : java -Djdk.attach

问题 JSPs and html files are served by my Glassfish server in NetBeans, but not servlets. Latest NetBeans is configured to use JDK latest 13, and Glassfish is using Java EE 1.8 Error reported in the browser: HTTP Status 500 - Internal Server Error type Exception report message Internal Server Error description The server encountered an internal error that prevented it from fulfilling this request. exception javax.servlet.ServletException: Error instantiating servlet class com.example.NewServlet

来源： https://stackoverflow.com/questions/61211695/openjdk-64-bit-server-vm-warning-options-xverifynone-and-noverify-were-depre

问题 Reading the JAVA 13 SE specification, I found in chapter 5, section 5.1.7. Boxing Conversion the following guarantee: If the value p being boxed is the result of evaluating a constant expression (§15.28) of type boolean, char, short, int, or long, and the result is true, false, a character in the range '\u0000' to '\u007f' inclusive, or an integer in the range -128 to 127 inclusive, then let a and b be the results of any two boxing conversions of p. It is always the case that a == b I find it

问题 Error Message: Error: JavaFX runtime components are missing, and are required to run this application LOOK HERE: project structure photo I have downloaded the javafx extentions for the project as well as the jar file and attached it, the program knows javafx is there since the code errors went away. However, it then said there were no docs and no it says there's no JavaFx runtime components. I have been hiting error after error trying to get javafx to just run a hello world program in eclipse

问题 Error Message: Error: JavaFX runtime components are missing, and are required to run this application LOOK HERE: project structure photo I have downloaded the javafx extentions for the project as well as the jar file and attached it, the program knows javafx is there since the code errors went away. However, it then said there were no docs and no it says there's no JavaFx runtime components. I have been hiting error after error trying to get javafx to just run a hello world program in eclipse

问题 Error Message: Error: JavaFX runtime components are missing, and are required to run this application LOOK HERE: project structure photo I have downloaded the javafx extentions for the project as well as the jar file and attached it, the program knows javafx is there since the code errors went away. However, it then said there were no docs and no it says there's no JavaFx runtime components. I have been hiting error after error trying to get javafx to just run a hello world program in eclipse

问题 Files.isHidden(Path.of("c:\\")) returns true on Windows 10, JDK 13 but returns false on JDK 12 same machine. Anyone know why this is? 回答1: It was a bug that was fixed with JDK 13. On Microsoft Windows, the java.nio.file.Files.isHidden method has historically ignored the DOS "hidden" attribute on directories. This has been fixed in this release so that isHidden now returns true when invoked to test a directory that has this attribute set. From the release notes 回答2: As already mentioned, the

问题 All the documentation I've been able to find mentions the 'jre/lib/ext' folder but such does not exist on my JRE 13 installation. I guess somewhere between Java 8 (where I can see the jars in jre/lib/ext) and Java 13, they moved but I've been unable to pinpoint when and how it was done. Could someone please elaborate what's going on with new JRE's, in terms of where the extension classes reside currently? 回答1: The extension mechanism is gone with Java 9, not only moved [:-| , see the