how to execute a shell command from Java applications. ?

import java.io.BufferedReader;
import java.io.InputStreamReader;


public class ShellCommandExample {
    public static void main(String[] args) {
        try {
            // Command to execute (e.g., listing files in a directory)
            String command = "ls -l";


            // Create ProcessBuilder
            ProcessBuilder processBuilder = new ProcessBuilder();
            // Set the command to execute
            processBuilder.command("bash", "-c", command);


            // Start the process
            Process process = processBuilder.start();


            // Read the output of the command
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }


            // Wait for the process to finish
            int exitCode = process.waitFor();
            System.out.println("Exited with error code: " + exitCode);


        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}