redirecting.java

来自「这是Java思想的最高集萃」· Java 代码 · 共 21 行

package chapter18;
import java.io.*;
public class Redirecting {
	public static void main(String args[])throws IOException{
		PrintStream console=System.out;
		BufferedInputStream in=new BufferedInputStream(new FileInputStream("test2.txt"));
		PrintStream out=new PrintStream(new FileOutputStream("testOut.txt"));
		System.setIn(in);
		System.setOut(out);
		System.setErr(out);
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String s;
		while((s=br.readLine())!=null){
			System.out.println(s);
		}
		out.close();
		System.setOut(console);
		
	}
}