java执行命令行命令

package javai;

import java.io.BufferedReader;

import java.io.InputStreamReader;

public class IOTest {

    public static void main(String[] args) {
        try {
            Process pro = Runtime.getRuntime().exec("ping www.baidu.com");
            String line;
            BufferedReader buf = new BufferedReader(new InputStreamReader(pro.getInputStream()));
            while ((line = buf.readLine()) != null)
                System.out.println(line);
        } catch (

        Exception e)

        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}