readfromprocess.java

疯狂Java讲义_源码(含Java设计模式CHM

import java.io.*;
/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class ReadFromProcess
{
	public static void main(String[] args)
	{
		BufferedReader br = null;
		try
		{
			//运行javac命令，返回运行该命令的子进程
			Process p = Runtime.getRuntime().exec("javac");
			//以p进程的错误流创建BufferedReader对象（这个错误流对本程序是输入流，对p进程则是输出流）
			br = new BufferedReader(new InputStreamReader(p.getErrorStream()));
			String buff = null;
			//采取循环方式来读取p进程的错误输出
			while((buff = br.readLine()) != null)
			{
				System.out.println(buff);
			}
		}
		catch (IOException ex)
		{
			ex.printStackTrace();
		}
		finally
		{
			try
			{
				if (br != null)
					br.close();
			}
			catch (IOException ex)
			{
				ex.printStackTrace();
			}
		}
	}
}