Java调用shell并打印输出结果

import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Process proc = Runtime.getRuntime().exec("pwd");
        InputStream inputStream = proc.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
        String line = null;
        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }
        proc.waitFor();
    }
}