Question

I have a Shell Scripts that read the Input

#!/bin/bash
echo "Type the year that you want to check (4 digits), followed by [ENTER]:"
read year
echo $year  

I’m executing this shell scripts using JAVA APi

ProcessBuilder pb = new ProcessBuilder("/bin/bash", "/junk/leaptest.sh");
final Process process = pb.start();

InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;


while ((line = br.readLine()) != null) {
    System.out.println(line);       
}
System.out.println("Program terminated!");

In the Java Console I can see the Output

Type the year that you want to check (4 digits), followed by [ENTER]:

Now the Actual Problem in How to pass the values to the Shell Scripts in my scripts how the varialble “year” can be read

---

I have edited the code as per the suggestion but doesn’t work where we correct it

ProcessBuilder pb = new ProcessBuilder("/bin/bash", "-c", "/junk/leaptest.sh");
final Process process = pb.start();
InputStream is = process.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line;
/*
 * OutputStream os = process.getOutputStream(); PrintWriter pw = new
 * PrintWriter(os);
 */

BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
while ((line = br.readLine()) != null) {
    System.out.println(line);
    // pw.println("8999");
    bw.write("2012");
}
System.out.println("Program terminated!");

Answer 1

To pass values from java program that executes script to the script use command line arguments. If you want to send information back from script to java program print the value in script, read the script’s STDOUT in java program and parse it.

You really almost there. Now you are reading the script output (into while loop) but you are just printing it. Parse the output and do what you need with it.