import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.PrintStream;

public class PrintStreamDemo {

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

        PrintDemo();

    }

    private static void PrintDemo() throws IOException {

        PrintStream out = new PrintStream("F:\\print1.txt");

        //out.write(97);//写入门的是一个字节，只写最低8位，就是最低的那个字节

        out.print(97);//写入的是原样的数据，原理是先将数据变成字符串保持原样将数据打印到目的地

        out.close();

    }

}

import java.io.BufferedReader;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

public class PrintWriterDemo {

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

        PrintDemo();

    }

    public static void PrintDemo() throws IOException {

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

        //PrintWriter out = new PrintWriter(System.out,true);

        PrintWriter out = new PrintWriter(new FileWriter("F:\\0.txt"),true);

        String line = null;

        while((line = bufr.readLine())!=null){

            if("over".equals(line)){

                break;

            }

            out.println(line);//PrintWriter out = new PrintWriter(System.out,true);写了true会自动刷新

            //out.flush();

        }

        bufr.close();

        out.close();

    }

}