Update-alternatives --config java

sudo update-alternatives --config java
update-alternatives --config java

There are 2 programs which provide 'java'.

  Selection    Command
-----------------------------------------------
*+ 1           java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.382.b05-1.el7_9.x86_64/jre/bin/java)
   2           java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.20.0.8-1.el7_9.x86_64/bin/java) 

Enter to keep the current selection[+], or type selection number:

/bin/java

See also

• Java, JVM, JDK, JRE, OpenJDK, Tomcat, Java Management Extensions (JMX), Apache Maven, Gradle, Micronaut, RMI, JNDI, Log4j, Spring framework, Java version history, .jar, .war, .ear, Java annotations, Java code coverage tools, JMS, Java 8, Java 10, Java 11, Java 20, /bin/java, Invalid Java version, java.util