003BIO的基本使用

引入了转换

package in;

import java.io.*;

public class MyTransStream {
    public static void main(String[] args) throws Exception {
//        read001();
//        read002();
//            read003();

        read004();

    }

    private static void read004() throws Exception {
        InputStream in = System.in;
        PrintStream out = System.out;
        OutputStreamWriter outputStreamWriter = new OutputStreamWriter(out);
        BufferedWriter bufferedWriter = new BufferedWriter(outputStreamWriter);


        InputStreamReader reader = new InputStreamReader(in);
        BufferedReader bufferedReader = new BufferedReader(reader);
        String res = null;
        while ((res = bufferedReader.readLine()) != null) {
            if ("over".equals(res)) {

                break;
            }
//            System.out.println(res);//替代
//            outputStreamWriter.write(res+"\r\n");//替代
            bufferedWriter.write(res);bufferedWriter.newLine();
//            outputStreamWriter.flush();
            bufferedWriter.flush();
        }
//        outputStreamWriter.close();//对应添加
        bufferedWriter.close();
        bufferedReader.close();

    }

    private static void read003()throws
    Exception{
        InputStream in = System.in;
        StringBuilder sb = new StringBuilder();
        int res = 0 ;
        while ((res = in.read()) != -1) {
            if(res=='\r')
                continue;
            if(res=='\n') {
                String s = sb.toString();
                if("over".equals(
                        s
                ))
                    break;

                System.out.println(s);
                sb.delete(0, sb.length());
            }else {

                sb.append((char) res);
            }
        }
    }

    private static void read002() throws Exception {
        InputStream in = System.in;
        int res = 0;
        while ((res = in.read()) != -1) {
            System.out.println((char)res);
        }

    }

    private static void read001() throws Exception {
        InputStream in = System.in;
        int num = in.read();//给键盘一次录入也就是enter之前都在流中，有两个功能，第一输入，第二读取
        System.out.println("num = " + num);
    }
}

流的基本使用从最初的byte
主要注意的就是写操作中的enter，如果是文字就要有特殊的操作了。