How do you find out what Java version is installed?

Posted on by David Darling

How do you find out what Java version is installed?

Option 2: Check Java Version on Windows Using Command Line

  1. Open the Windows Start menu in the bottom-left corner and type cmd in the search bar.
  2. Then, open the Command Prompt once it appears in the search results.
  3. A new window with the command prompt should appear. In it, type the command java -version and hit Enter.

How do I know where Java is installed on Linux?

This depends a bit from your package system if the java command works, you can type readlink -f $(which java) to find the location of the java command. On the OpenSUSE system I’m on now it returns /usr/lib64/jvm/java-1.6. 0-openjdk-1.6. 0/jre/bin/java (but this is not a system which uses apt-get ).

What Java version do I have Linux?

Conclusion. Finding out what Java version is installed on your Linux system is very easy, just type java -version .

How do I know if I have Java 1.8 installed?

Answer

  1. Open the command prompt. Follow the menu path Start > Programs > Accessories > Command Prompt.
  2. Type: java -version and press Enter on your keyboard. Result: A message similar to the following indicates that Java is installed and you are ready to use MITSIS via the Java Runtime Environment.

How do I change Java version in terminal?

Switching Java Versions Via the Command Line

  1. a $JAVA_HOME environment variable set.
  2. a java executable on the $PATH.

Is Java 1.8 the same as Java 7?

Java 7 brings JVM support for dynamically-typed languages plus Type Interference for Generic Instance creation. Java 8 brings the most anticipated feature for the programming language called Lambda Expressions, a new language feature which allows users to code local functions as method arguments.

How do I change Java version on Linux?

Procedure

  1. Download or save the appropriate JDK version for Linux.
  2. Extract the compressed file to the required location.
  3. Set JAVA_HOME using the syntax export JAVA_HOME= path to JDK .
  4. Set PATH using the syntax export PATH=${PATH}: path to the JDK bin .
  5. Verify the settings using the following commands:

Can I have two Java versions installed?

It is very possible to run multiple versions of Java on the same machine so you can run your existing applications and Ignition at the same time.