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user@machine:/usr/lib/jvm/tools/sudo update-java-alternatives -s default-java |
Sometimes the previous command fails because default-java refers to an existing JVM:
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user@machine:/usr/lib/jvm/tools$ sudo update-java-alternatives -s default-java
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/appletviewer for appletviewer not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/extcheck for extcheck not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/idlj for idlj not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jarsigner for jarsigner not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jar for jar not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/javac for javac not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/javadoc for javadoc not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/javafxpackager for javafxpackager not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/javah for javah not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/javapackager for javapackager not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/javap for javap not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jcmd for jcmd not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jconsole for jconsole not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jdb for jdb not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jdeps for jdeps not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jhat for jhat not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jinfo for jinfo not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jmap for jmap not registered; not setting
update-alternatives: error: alternative /usr/lib/jvm/ramdisk-java-8-oracle/bin/jmc for jmc not registered; not setting |
In our configuration .default-java.jinfo refers to .ramdisk-java-8-oracle.jinfo:
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user@machine:/usr/lib/jvm$ ls -al .default-java.jinfo
lrwxrwxrwx 1 root root 30 Jul 12 14:29 .default-java.jinfo -> ./.ramdisk-java-8-oracle.jinfo |
It means that ramdisk-java-8-oracle should be installed through the Update Alternatives mechanism before we can set the alternatives to default-java.
Then check again that everything is correct with your Java Update Alternatives Environment.
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