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sachin@sachin-Lenovo-G550:~$ java -version
java version “1.7.0_21″
OpenJDK Runtime Environment (IcedTea 2.3.9) (7u21-2.3.9-1ubuntu1)
OpenJDK Server VM (build 23.7-b01, mixed mode)

When I ran the above command this showed that Java is installed in my system, but when I am going to compile any Java program it gives the following error message:

sachin@sachin-Lenovo-G550:~/programs$ javac abc.java
The program ‘javac’ can be found in the following packages:
* default-jdk
* ecj
* gcj-4.6-jdk
* gcj-4.7-jdk
* openjdk-7-jdk
* openjdk-6-jdk
Try: sudo apt-get install

Please tell me how to get rid of it and run my Java program.

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1 Answer 1

Open the terminal and run:

sudo apt-get install openjdk-7-jdk

and then compile your Java program as before with: javac abc.java. Then run it with:

java abc  ## The name of the class to be called is abc NOT abc.class

You can also substitute openjdk-6-jdk instead of openjdk-7-jdk in the first command.

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