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Garfield
Garfield

Reputation: 29

Execution of Java program

After searching all over the web, I am not able to solve my problem of Java execution. When using command prompt to run my "first" Java program, I am faced with the errors of Unsupported class version and Main class not found. Program will exit.

I have 2 versions of Java on my PC, Java 6 and 7. I have set the path of the JDK 7 in path environment variables and classpath too. I know the problem: I have javac -version as 1.7.02 and java version as 1.6.02, but how to change it and fix the problem?

Please elaborate the problem in easy and understandable language!

Upvotes: 3

Views: 302

Answers (2)

mehdi shahdoost
mehdi shahdoost

Reputation: 1489

JRE [java command] come with your JDK 1.7, and you must change your JAVA_HOME variable to your JDK 1.7 folder.for this work read this article

Upvotes: 0

juergen d
juergen d

Reputation: 204766

You have to run your program with the same or higher version of java that yxou compiled it with.

So you can either compile your program with Java 6 on your PC or run it with java 7.

To run your program with java 7 just use the complete path to your java runtime environment. for instance

c:\jdk7\bin\jawaw.exe yourprogram

How to tell your system which Java version to use is explained here: Why does java -version returns old version?

Upvotes: 3

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