How to run a JAR with a specific JRE?

Asked

Viewed 1,226 times

0

I have Java 7, 8 and 9 installed on the same machine and I want to make my program run using Java 7, how do you do it on? (may be on the command line or not).

java
  • 1

    Or at calling time jar uses the full JRE path or try to create environment variables for each one ...

2 answers

1

Hello,

Just run javaw.exe in the Java 7 folder

Assuming your Java 7 is in the folder 

C:\Program Files\Java\jdk1.8.0_181\jre\bin

If you are in windows open a DOS prompt and from this path you will run your jar like this

At the DOS prompt

cd C:\Program Files\Java\jdk1.8.0_181\jre\bin
javaw.exe -jar MeuJar.jar

  • But I have to put my . jar in the same folder as javaw.exe?? If I want to run in different directories how does that look like??

  • No need, you can create a file for example. bat and put the jar where you want, have two options, or you make a cd to the folder or run the full path

  • Suppose your . jar is in a c:/tmp folder you could put so in your file . bat

  • #bat cd c:/tmp C:/Program Files/Java/jdk1.8.0_181/jre/bin/javaw.exe Meujar.jar

  • or so #.bat C:/Program Files/Java/jdk1.8.0_181/jre/bin/javaw.exe c:/tmp/Meujar.jar

0

One possibility is to switch to default java. In a linux environment (shell bash) you can use the commands:

sudo apt install oracle-java7-set-default
sudo apt install oracle-java8-set-default
sudo apt install oracle-java9-set-default

To check the version:

java -version

>>>
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)

Browser other questions tagged java

You are not signed in. Login or sign up in order to post.