3

I wanted to know if there is a way, from a sh script, to input value in a Java program. For example I have a program.jar. I do java -jar program.jar and it outputs:

Enter your name:

Would it be possible to write an sh script like that:

java -jar program
echo name

where name is gonna be the input for the program?

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4 Answers 4

Reset to default
5

To echo data into your java program from the shell do something like this:

java -jar program<< EOF
<your-data>
EOF
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2

In addition to @tcb 's suggestion, you can also use a standard input redirection pipe < in order to specify a file that will be the input of the program:

input.txt

name

And in the sh:

java -jar program < input.txt

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1

Use pipes:

echo name | java -jar program
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1 Comment

Isn't that cat name? Surely if the input was literally "name" then the OP would have already understood to write java -jar program name.
1

If you mean interactive input , expect is always one of the answers.

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