Giving input to Java through a batch file

Question

I am developing an application in which users give an input in the batch file and that batch file input be given as an input to eclipse and oy will run a Java program(logic) and give the output either through a batch file or an excel.

possible duplicate of [Java - Read CSV with Scanner()](http://stackoverflow.com/questions/14274259/java-read-csv-with-scanner) — Ognyan Dimitrov, Jul 02 '15 at 05:23
Input is a few parameters for a functionality. For example, while dealing with ports, portId is an input. Inputs are fine. I just need to know how do I make eclipse read those inputs that are given in the batch file. — vivek narayan, Jul 02 '15 at 05:26
Decide either you run your program just using command line or set Run Configurations, command args in Eclipse. Your are mixing 2 things i.e. trying to do something wrong. — Rajesh, Jul 02 '15 at 06:16

score 0 · Accepted Answer · answered Jul 02 '15 at 05:55

In Eclipse you can set arguments using Run > Run Configurations > Arguments

Running the jar file directly works just as simple: java -jar someFile.jar port ip whatever else

Those arguments will be passed to the main() method as a String[], so if you want numbers you will have to convert them.

public static void main(String[] args) {

        System.out.println(args[0]); // port
        System.out.println(args[1]); // ip
        System.out.println(args[2]); // whatever
        System.out.println(args[3]); // else
    }

score 0 · Answer 2 · answered Jul 02 '15 at 07:54

In the batch file you'll have something like this:

echo off
java -jar MyJavaJar.jar %1 %2 %*

Where %1 is the first parameter, %2 the second and %* anything else...

In your java class:

public static void main(String[] args) {
    //Check if args were supplied, e.g. args.length
    //else out put usage information
}

Hope this helps

Giving input to Java through a batch file

2 Answers2