Java I/O学习 标准的I/O重定向

public class Test{



	/*

	 * 标准的I/O重定向

	 * System.setIn(InputStream)

	 * System.setOut(PrintStream)

	 * System.setErr(PrintStream)

	 */

	public static void main(String[] args) throws IOException {

		PrintStream console = System.out;

		BufferedInputStream in = new BufferedInputStream(new FileInputStream("/home/estar/Test/a.java"));

		PrintStream out = new PrintStream("and.out");

		

		System.setIn(in);

		System.setOut(out);

		System.setErr(out);

		

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String s = null;

		while ((s = br.readLine()) != null) {

			System.out.println(s);

		}

		out.close();

		System.setOut(console);

		

	}

}