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I have java 8 installed on fedora 20. Any java program runs perfectly fine via eclipse but when I run the same program on terminal it reports an error saying 'could not load main class' . what could be the problem?

I wrote a simple helloworld program named hello.java and executed on eclipse. Then I opened terminal and moved to the folder containing the hello.class in eclipse workspace and typed ' java hello '. But it said 'error:could not load main class'.

Also as I said I have installed and I use oracle java 8.

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Welcome to Unix.SE! You need to give a little more detail: what command are you typing to start your program? Please edit your question to add the info. –  Stephen Kitt Jun 29 at 7:57
    
Could you please paste the code of your Hello.java file? –  binfalse Jun 29 at 8:32

2 Answers 2

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You need to open it with java -jar Hello

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It did not work. –  Aditya Gupta Jul 3 at 17:43
    
What's the error? –  nifker Jul 3 at 17:44
    
Error: unable to access jarfile Hello –  Aditya Gupta Jul 4 at 15:29
    
Have you given the file execute permission? –  nifker Jul 10 at 0:03
up vote 0 down vote

in terminal type java -version and observe the version that appear.

say, it is v1

in eclipse Window->Preferences->Java compiler, check version

say it is v2

To work v2 must be <= v1, if eclipse has newer java version you need one of two:

1) install newer java on linux 2) downgrade java compiler in eclipse

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Java version at both the places is 1.8 . –  Aditya Gupta Jul 4 at 15:27
    
Check that: stackoverflow.com/questions/18093928/… –  Vladimir Nabokov Jul 4 at 17:24
    
Yeah.... Found the solution. I had to use '-cp . ' option to include the current directory in class path. Surprisingly it java does not even look in the current working directory for .class files. I had to use ' java -cp . Hello' to run the class file. –  Aditya Gupta Jul 26 at 11:14

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