How do I change Java alternatives in Linux?

To set the Java version interactively:

1. Log in as root or use sudo .
2. View the Java alternatives. sudo update-alternatives –config java. …
3. Select a Java version, at the prompt, type a number. Press enter to keep the default[*], or type selection number: …
4. Verify the switch, check the Java version. java -version.

How do I install Java update alternatives?

Assuming one has installed a JDK in /opt/java/jdk1.8.0_144 then:

1. Install the alternative for javac $ sudo update-alternatives –install /usr/bin/javac javac /opt/java/jdk1.8.0_144/bin/javac 1.
2. Check / update the alternatives config: $ sudo update-alternatives –config javac.

6 окт. 2015 г.