java not installed error fixed

[Ritika8081]

solve #3105 Thanks in advance for your contribution. Please follow the below steps in submitting a pull request, as it will help us with reviewing it quicker.

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[Ritika8081]

@garg3133 I have tried to solve issue please review it and tell if there is any issue .

[garg3133]

@Ritika8081 Thanks, I'll try to review this PR tomorrow.

But, on a quick glance, instead of using additional packages (which btw are already included with Node and don't need to be installed separately) and checking if java -version command works, you could try to follow where exactly the error is occurring if Java is not installed and then try to catch and modify the error so that it is easier for user to understand.

But, in case that approach doesn't work, testing java -version also seems a fair (but costly) solution.