I'm rank new to bash thus the question.
I've a java program that I've exported as a .jar.
This file when run as
java -jar somefile.jar
goes into an infinite loop and awaits a file name. Based on the correct file path it generates an output.
How do I write a bash script to do automated testing of this project.
I need the scrip to do the following -
Run the program, which is run the same command
provide an array of 5 files as an input to the program
For each file write the output to an log file.
This should do it.
#!/bin/bash
files="$#"
for i in $files;
do
echo "Doing $i"
java -jar somefile.jar <<< "$i"
done
Make sure you chmod u+x filename it first. Then call it like this:
./filename firstfile secondfile thirdfile etc.
Other:
As sjsam pointed out, the use of <<< is a strictly bash thing. You are apparently using bash ("I'm rank new to bash..."), but if you weren't, this would not work.
Suppose my java program is HelloWorld.java. We can run it in 2 ways:
1st using executable jar
2nd by running java class from terminal
create a new text file and name it hello.sh
In hello.sh
!/bin/bash
clear
java -jar HelloWorld.jar
Save it and open terminal:
1 navigate to directory where your HelloWorld.jar is present
2 give permission to terminal to run the bash script by using the following command
sudo chmod 754 hello.sh
3 run you script by running the following command
./hello.sh
Related
I am currently using a linux system to execute a specific command that translates into another java command (java - jar)
For example:
when i try execute /usr/bin/a in terminal, it will read the /usr/bin/a command and translates into 'java -jar' command
I do not want to execute 'java -jar' command directly and i would to specify a full path in executing the command so is there a possible way to achieve this without using a script like /.sh?
Things that i have attempted:
i have tried using the alias command in bashrc files
for example in bashrc file:
alias /usr/bin/a='java - jar'
but when i try to source the bashrc files, it gives me an invalid alias.
I know i can use a /.sh script to execute the command but that is not my intention to do it.
Have you tried to write a bash script with java -jar and execute it ?
You test.sh file will contain:
java -jar test.jar
And after that you can run
./test.sh
And offcourse you can put to bin directory or create an alias for that bash file
I have error while executing java command with .sh file with external library.
I have wrote a script called executer.cmd which contains
java -cp .;hsql.jar hsqlconnector %*
its working fine with windows.
For Unix also I have wrote a script and make u+x with chmod but still m getting error
of
bash: hsql.jar command not found
My executor.sh looks like
java -cp .;hsql.jar hsqlconnector %*
On Linux you must use : (colon) instead of ; (semi-colon) to separate entries on a path, because ; has a different meaning in the shell on Linux.
See here:
http://www.coderanch.com/t/526784/Linux-UNIX/cp-linux-include-additional-jar
I have created a jar file called test.jar under C:\jars. I have JAR file under the same location named run.bat and it contains the below code -
#echo off
set exec_path=C:\jars java -cp %exec_path%/test.jar; com.mycomp.myapp.MyProgram "%1"%*
#echo on
It is running successfully from command prompt with parameters.
Now I would like to run it from another JAVA program.
Please suggest.
Thanks!
I've encountered this issue before. The answer is that you have to run cmd.exe or bash or whatever shell you've got, then feed in the command to that process via the process input/output streams.
Process p = Runtime.getRuntime().exec("cmd");
p.getOutputStream().write("mybatch.bat\n");
I have to create a Unix shell script to execute Java code which takes a input file and creates an output file. This is how I do it on Windows:
C:\Work\MCDExcelParserJE\bin>java -classpath .\;.\jxl.jar medicaid.Test PROCESS
How can I run this on Unix?
First thing is that you need to use colon(:) instead of semi-colon(;) in your classapth:
java -classpath .\;.\jxl.jar medicaid.Test PROCESS
should be updated to
java -classpath ./:./jxl.jar medicaid.Test PROCESS
Make sure you have jdk/bin directory is added to path in order to run the java commands.
I have an executable jar that I know is executing, because I put two distinct beeps at the beginning of the code that I hear whenever I double click on it or when I run it through the cli. Even when I run it through the command line however, it does not display output nor prompt for input when I use System.out/System.in respectively. Everything is functional when I run it through eclipse.
How do I get the .jar to output/input to the same command line I executed it in?
Assuming java is in your PATH, you should lauch your program as follows :
java -jar myProgram.jar
If you want to run it without opening the command line, you could create a .cmd file in the same directory with this content :
#echo off
java -jar myProgram.jar
pause
then, double-click on the .cmd file.