CODEWITHSUNDEEP
javajarexecutable-jar
Catalin
Catalin

Reputation: 263

Java run jar from another jar with passing arguments

I have generated run1.jar:

   package runner;

    import java.io.IOException;
    import java.io.PrintWriter;

    public class Run1 {
        public static void main(String[] args) {

            int i = Integer.parseInt(args[0]);
            System.out.println(i);

            try {
                PrintWriter writer = new PrintWriter("1.txt", "UTF-8");
                writer.println(i);
                writer.println(i);
                writer.close();
            } catch (IOException e) {
                // do something
            }

        }
    }

Also I have generated run2.jar:

package runner;

import java.io.File;
import java.io.IOException;

public class Run2 {

    public static void main(String[] args) throws IOException, InterruptedException {

        ProcessBuilder pb = new ProcessBuilder("java", "-jar", "C:\\test2\\run1.jar", "1");
        pb.directory(new File("C:\\"));
        try {
            Process p = pb.start();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}

I have ran with this command java -jar run2.jar 1 and work it. Expecting result is running with this command: java -jar run2.jar who doesn't work.

How can I run run2.jar with passing parameters from inside main method in run2.jar?

Error is:

C:\test2>java -jar run2.jar
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoa
der.java:58)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
        at runner.Run1.main(Run1.java:9)

Upvotes: 4

Views: 4377

Answers (2)

Frank
Frank

Reputation: 881

Here we are , below two different example which answer to your question 

Process proc = Runtime.getRuntime().exec("java -jar C:\\...\\Run1.jar 1");
        proc.waitFor();

        //2 inputstream for the result and for the errors in subprogram     
        InputStream in = proc.getInputStream();
        InputStream err = proc.getErrorStream();

        byte b[]=new byte[in.available()];
        in.read(b,0,b.length);
        System.out.println(new String(b));

        byte c[]=new byte[err.available()];
        err.read(c,0,c.length);
        System.out.println(new String(c));

        ProcessBuilder pb = new ProcessBuilder("java", "-jar", "C:\\...\\Run1.jar", "1");
        Process proc2 = pb.start();
        proc2.waitFor();

        InputStream in2 = proc2.getInputStream();
        InputStream err2 = proc2.getErrorStream();

        byte b2[]=new byte[in.available()];
        in.read(b,0,b.length);
        System.out.println(new String(b));

        byte c2[]=new byte[err.available()];
        err.read(c,0,c.length);
        System.out.println(new String(c));

Output from IDE (Eclipse)

enter image description here

Output from command line :

enter image description here

Note: the "ok" is a my System.out.println i put in Run1.jar ( i saved the files jar with capital letter , but you can use yours names )

Upvotes: 2

Aubin
Aubin

Reputation: 14853

The error I have added to your question is relative to a missing argument: args[0], line 9 throw ArrayIndexOutOfBoundsException.

The argument "1" isn't passed to run1.jar

The exception stack shows a jar-in-jar loader usage, why?

Build the jars with Oracle command line utilities or ANT and test again.

Upvotes: 0

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