How to wait for the cmd command to get executed before running the next command?

Question

Need to wait for the cmd command to get executed before running the display function.

Need the Process p to get executed completely before executing display function.

String command1 = "cmd /c start cmd.exe /k \"" + processCommand1 + " && " + processCommand2  +" && "+ exitCommand+"\"";

Process p = Runtime.getRuntime().exec(command1);

display();

Answer 1

One way would be to use Process.waitFor(). However in your example you are using cmd /c start which will run the actual program asynchronously in the background. You should ensure that the program is started synchronously without start so you can wait for it.

Answer 2

Better to use java.lang.ProcessBuilder. JavaDoc had example: https://docs.oracle.com/javase/7/docs/api/java/lang/ProcessBuilder.html Something like that:

ProcessBuilder processBuilder = new ProcessBuilder("...");
...
Process process = processBuilder.start();
...
int exitCode = process.waitFor();