如何在 Java 中執行命令提示字元命令，包括目錄變更？

import java.io.*;

public class CmdRunner {
    public static void main(String[] args) throws Exception {
        ProcessBuilder builder = new ProcessBuilder(
            "cmd.exe", "/c", "cd \"C:\Program Files\Flowella\" && dir");
        builder.redirectErrorStream(true);
        Process p = builder.start();

        BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String line;
        while ((line = r.readLine()) != null) {
            System.out.println(line);
        }
    }
}