java-11

What is the exact difference between JDK_JAVA_OPTIONS and JAVA_TOOL_OPTIONS when using Java 11? They seem to do the same, but the output is slightly different. That makes me believe they might have different use cases: $ JDK_JAVA_OPTIONS="-Dstuff" java Foo NOTE: Picked up JDK_JAVA_OPTIONS: -Dstuff $ JDK_JAVA_OPTIONS="illegalStuff" java Foo NOTE: Picked up JDK_JAVA_OPTIONS: illegalStuff Error: Cannot specify main class in environment variable JDK_JAVA_OPTIONS $ JAVA_TOOL_OPTIONS="-Dstuff" java Foo Picked up JAVA_TOOL_OPTIONS: -Dstuff $ JAVA_TOOL_OPTIONS="illegalStuff" java Foo Picked up JAVA

AWS allows to create Lambda function with Java 8 (Open JDK 8) as runtime . I need to create a simple function using Open JDK 11 , somthing like that: package example; import com.amazonaws.services.lambda.runtime.Context; import com.amazonaws.services.lambda.runtime.LambdaLogger; public class Hello { public String myHandler(int myCount, Context context) { LambdaLogger logger = context.getLogger(); logger.log("received : " + myCount); return String.valueOf(myCount); } } There is an option that allows to use a custom runtime and a tutorial that contains an example with Shell. However there is no

When redeclaring Integer 'a' in line 33, why does jshell show the reference variable as an instance of Integer (refer to lines 38 & 39)? After the redeclaration, line 34 shows that 'a' is set to null. When 'a' is declared in line 6 but not given a value, or reset to null in line 22, 'a' is not considered an instance of Integer. I would expect that when the reference variable is redeclared, since its value is null, that it would not be an instance of a type; however, that is not the case. 01: java-lava:~ cafedude$ jshell 02: | Welcome to JShell -- Version 11 03: | For an introduction type:

thanks to pupeno for his precedent work on spring and moditect that helped me for most of my problem on the subject, however I'm blocked a bit further that he was. my problem is the illegal access exception my poc is available on github I used to add this bit of code to make it work with intelliJ IDEA : <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> <configuration> <compilerArgs> <arg>--add-opens java.base/java.lang=ALL-UNAMED</arg> </compilerArgs> <source>11</source> <target>11</target> </configuration> </plugin>

i running on Linux my junit test with openJDK 11 and got following error: java.lang.ClassCastException: class sun.font.CompositeFont cannot be cast to class sun.font.PhysicalFont (sun.font.CompositeFont and sun.font.PhysicalFont are in module java.desktop of loader 'bootstrap') at java.desktop/sun.font.SunFontManager.getDefaultPhysicalFont(SunFontManager.java:1086) at java.desktop/sun.font.SunFontManager.initialiseDeferredFont(SunFontManager.java:965) at java.desktop/sun.font.SunFontManager.findOtherDeferredFont(SunFontManager.java:903) at java.desktop/sun.font.SunFontManager.findDeferredFont