Run multiple processes of a same class using ProcessBuilder

Method 1, cloning

I don't know how good idea it is but, you could try doing something like this:

ProcessBuilder customer = new ProcessBuilder("java.exe","-cp","bin","lab_3.Customer"); Process runCustomer = customer.clone().start(); 

The .clone() will make a copy of it and then start the process from it. Now you can do:

ProcessBuilder customer = new ProcessBuilder("java.exe","-cp","bin","lab_3.Customer"); Process runCustomer1 = customer.clone().start(); Process runCustomer2 = customer.clone().start(); Process runCustomer3 = customer.clone().start(); Process runCustomer4 = customer.clone().start(); 

Method 2, array of arguments

Also you could store your arguments in an array and every time you want to start new Process, you would just create a new instance of ProcessBuilder, like so:

String command = "java.exe"; String[] args = new String[]{ "-cp", "bin", "lab_3.Customer" }; for(int i = 0; i < numOfProcesses; i++) { new ProcessBuilder(command, args).start(); } 

And like this, if you need to store created Processes:

String command = "java.exe"; String[] args = new String[]{ "-cp", "bin", "lab_3.Customer" }; Process[] processes = new Process[numOfProcesses]; for(int i = 0; i < numOfProcesses; i++) { processes[i] = new ProcessBuilder(command, args).start(); }