import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) throws IOException {
        // Simple script
        Process process = new ProcessBuilder()
                .command("echo", "Hello", "World")
                .start();
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        System.out.println(reader.lines().collect(Collectors.joining()));
        // Hard script
        Process process1 = new ProcessBuilder()
                .command("bash", "-c", "echo 'Hello\nWorld' | sed -n 1p")
                .start();
        BufferedReader reader1 = new BufferedReader(new InputStreamReader(process1.getInputStream()));
        System.out.println(reader1.lines().collect(Collectors.joining()));
    }
}