print流之错误日志

package jinjieshilie;
import java.io.*;
import java.util.Scanner;

public class print3 {

	public static void main(String[] args) {

		try{
			PrintStream plzq=new PrintStream("e:/aaa.txt");
			PrintStream plcw=new PrintStream("e:/bbb.txt");
			Scanner ss=new Scanner(System.in);
			System.setOut(plzq);
			System.setErr(plcw);

			while(true){
				int shuzi=ss.nextInt();
				System.out.println(shuzi);
			}
		}
		catch(Exception e){
			System.err.println("输入有误");
		}

	}

}