package javaIO;

import java.io.*;

import java.util.Arrays;

import java.util.Random;

/**

* Created by lenovo on 2017/3/11.

*/

public class StreamTransfer {

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

// ReadKeyboardToTerminal();//从键盘读入数据并打印到控制台

// ReadFileToTermial();//将文件输出到控制台

SortArrayToFile();//将一组整数排序，并输出到文件

// ReadKeyboardToFile();//从键盘读到文件

}

private static void ReadKeyboardToFile() throws IOException {

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

BufferedWriter bufw=new BufferedWriter(new FileWriter("E:\\javaStudy\\src\\javaIO\\aFile"));

String line=null;

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

bufw.write(line);

bufw.flush();

}

bufr.close();

bufw.close();

}

private static void SortArrayToFile() throws IOException {

//获得一个随机数组成的数组

Random random=new Random();//上限100

int[] arr=new int[100];

for(int i=0;i<100;++i){

arr[i]=random.nextInt(100);

}

Arrays.sort(arr);

//直接写入文件

BufferedWriter bufw=new BufferedWriter(new FileWriter("E:\\javaStudy\\src\\javaIO\\aFile"));

bufw.write(Arrays.toString(arr));

bufw.flush();

bufw.close();

}

private static void ReadFileToTermial() throws IOException {

//FileReader 是OutputStreamRead的子类，也具有将字节流转换为字符流的功能

BufferedReader bufr=new BufferedReader(new FileReader("E:\\javaStudy\\src\\javaIO\\when you are old"));

BufferedWriter bufw=new BufferedWriter(new PrintWriter(System.out));//将字符流转换为标准输出流（即字节流）；

String line=null;

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

bufw.write(line);

bufw.flush();

}

}

private static void ReadKeyboardToTerminal() throws IOException {

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

BufferedWriter bufw = new BufferedWriter(new OutputStreamWriter(System.out));

String line = null;

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

bufw.write(line);

bufw.flush();

}

bufr.close();

bufw.close();

}

}