What to do if linuxjdk does not take effect-linux operation and maintenance

What should I do if the linux jdk does not take effect?

After Linux modifies the jdk, it will not take effect. I encountered it once before, but I didn’t record it, so I will remember it this time.

1. Install jdk1.8.

2. Modify JAVA_HOME in /etc/profile to the new jdk path, and execute source /etc/profile.

3. Execute java -version. At this time, it shows that jdk is still version 1.7.

4. Execute:

which java
 which javac

Delete the java and javac files in the execution results of the above two instructions.

5. Execute:

ln -s $JAVA_HOME/bin/java /usr/bin/java
 ln -s $JAVA_HOME/bin/javac /usr/bin/javac

6. Execute:

source /etc/profile

7. Execute java -version, you can see that jdk is switched to version 1.8.

Note:

1. If the java file does not have permission when executing an error report, first set the permission for the java file: chmod u+x java.

Recommendation: “Linux Tutorial”

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