And the cost/benefit relation of moving along Oracle's ideas seems not worthwile.
And the cost/benefit relation of moving along Oracle's ideas seems not worthwile.
sudo apt install openjdk-8-jdk
sudo update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/lib/jvm/java-11-openjdk-armhf/bin/java 1111 auto mode
1 /usr/lib/jvm/java-11-openjdk-armhf/bin/java 1111 manual mode
2 /usr/lib/jvm/java-8-openjdk-armhf/jre/bin/java 1081 manual mode
Press <enter> to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/lib/jvm/java-8-openjdk-armhf/jre/bin/java to provide /usr/bin/java (java) in manual mode
wf@raspberrypi:~/source/java/com.bitplan.dac $ java -version
openjdk version "1.8.0_312"
OpenJDK Runtime Environment (build 1.8.0_312-8u312-b07-1+rpi1-b07)
OpenJDK Client VM (build 25.312-b07, mixed mode)
Mediawiki-Japi/src/main/java/com/bitplan/mediawiki/japi/api/Page.java:[34,33] package javax.xml.bind.annotation does not exist
Oracle decided to remove APIs
Do not use Oracle's incompatible Java versions - stay with Version 8
diff --git a/.travis.yml b/.travis.yml
# this is a java project using maven
language: java
+# make sure things keep working see http://wiki.bitplan.com/index.php/Java8
+jdk: openjdk8
Trying to start Eclipse oxygen leads to multiple ClassNotFoundExceptions
Surprise - stay with Java 8 ... Search it:
/usr/libexec/java_home -v 1.8
/Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home
and add it to your eclipse.ini (make sure using two lines as below ...
-vm /Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/bin/java
java: WARNING: Hazelcast is starting in a Java modular environment (Java 9 and newer) but without proper access to required Java packages. Use additional Java arguments to provide Hazelcast access to Java internal API. The internal API access is used to get the best performance results. Arguments to be used: java: --add-modules java.se --add-exports java.base/jdk.internal.ref=ALL-UNNAMED --add-opens java.base/java.lang=ALL-UNNAMED --add-opens java.base/java.nio=ALL-UNNAMED --add-opens java.base/sun.nio.ch=ALL-UNNAMED --add-opens java.management/sun.management=ALL-UNNAMED --add-opens jdk.management/com.sun.management.internal=ALL-UNNAMED
and then it doesn't work / the tcp connections fail
Code not working without changes
Surprise - stay with Java 8 ...
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.0.1:jar (attach-javadocs) on project com.bitplan.rest.freemarker: MavenReportException: Error while generating Javadoc: [ERROR] Exit code: 1 - javadoc: error - The code being documented uses modules but the packages defined in https://docs.oracle.com/javase/8/docs/api/ are in the unnamed module. [ERROR] [ERROR] Command line was: /usr/local/lib/jvm/openjdk11/bin/javadoc -Xdoclint:none @options @packages
java -Xmx32m -version
openjdk version "11.0.2" 2019-01-15
Java 11 javadoc is incompatible to prior versions
Surprise - stay with Java 8 ...
org.apache.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 19
at org.apache.bcel.classfile.Constant.readConstant (Constant.java:161)