执行shell命令时永远挂起(Java)

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

public class ShellCommandExecutor implements Runnable {
    private String command;

    public ShellCommandExecutor(String command) {
        this.command = command;
    }

    @Override
    public void run() {
        try {
            Process process = new ProcessBuilder(command.split(" ")).start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
            process.waitFor();
            reader.close();
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String command = "your_shell_command_here";
        Thread thread = new Thread(new ShellCommandExecutor(command));
        thread.start();
    }
}