How can I run a java program from a java program?

Question

I would like to write a java program that can run an another java programs Main class in runtime. How can I do that?

Anil Reddy Yarragonda · Answer 1 · 2015-07-08T12:58:35.887

0

Call main() method of Other class inside Static Initialization block (SIB) of the class.

import packagename.B.*; // all class B members are available in Class A 
    class A
    {
        static
        {
           B.main(new String[9]);
        }

        public static void main(String[] args) 
        {
          //do something
        }

    }
    class B
    {
       public static void main(String[] args) 
        {
          //do something
        }
    }

It will execute main() method of Class B before executing Class A.

edited Jul 08 '15 at 12:58

answered Jul 08 '15 at 12:19

Anil Reddy Yarragonda

747
5
19

`main` is Undefined in `B`. – joey rohan Jul 08 '15 at 12:29
The two programs are in different directory, package, and file. – Szalai Mihály Jul 08 '15 at 12:52
if there are in different package then we have to import the members into current package. See my update. – Anil Reddy Yarragonda Jul 08 '15 at 12:57

score 0 · Accepted Answer · edited May 23 '17 at 12:14

0

read this.

Basically you run new process and execute

Process tr = Runtime.getRuntime().exec( new String[]{ "XXX" } );

where XXX is phrase just like you would type in commandline. Remember that program might be in different location than your current execution so you might have to type command like java \path\to\program\program or such.

edited May 23 '17 at 12:14

Community

1
1

answered Jul 08 '15 at 12:23

T.G

1,913
1
16
29

How can I run a java program from a java program?

2 Answers2