Java I/O流简单实现

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package com.tjove.main;import java.io.BufferedReader;import java.io.ByteArrayOutputStream;import java.io.CharArrayReader;import java.io.CharArrayWriter;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import java.io.InputStreamReader;import java.nio.Buffer;public class Demo3 {    public static void main(String[] args) {        Demo3 demo3=new Demo3();                demo3.reader1();        demo3.reader2();        demo3.reader3();    }        /**     * 字符流 Reader--->FileReader     */    void reader1(){        char[] c=null;        CharArrayWriter charArrayWriter=new CharArrayWriter();        try {            FileReader reader=new FileReader("e:/src/aa.txt");            c=new char[10];            while ((reader.read(c, 0, c.length))!=-1) {                charArrayWriter.write(c, 0, c.length);            }            ;        } catch (Exception e) {            e.printStackTrace();        }        System.out.println("FileReader的结果：   "+new String(charArrayWriter.toCharArray()));            }        /**     * 字节流 InputStream--->FileInputStream     */    void reader2(){        byte[] buffer=null;        ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();        try {            FileInputStream reader=new FileInputStream("e:/src/aa.txt");            buffer=new byte[1024];            while ((reader.read(buffer, 0, buffer.length)!=-1)) {                byteArrayOutputStream.write(buffer);                            }        } catch (Exception e) {            e.printStackTrace();        }        System.out.println("FileInputStream的结果：   "+new String(byteArrayOutputStream.toByteArray()));            }    /**     * 装饰--->BufferedReader     */    void reader3(){        byte[] buffer=null;        String content=null;        StringBuffer stringBuffer=null;        String line=null;        try {            FileInputStream fileInputStream=new FileInputStream("e:/src/aa.txt");            InputStreamReader inputStreamReader=new InputStreamReader(fileInputStream);            BufferedReader reader=new BufferedReader(inputStreamReader);                        stringBuffer=new StringBuffer();            while ((line=reader.readLine())!=null) {                stringBuffer.append(line);                            }                    } catch (Exception e) {            e.printStackTrace();        }        System.out.println("BufferedReader的结果：   "+stringBuffer.toString());            }}
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Java I/O流 简单实现

Java I/O流简单实现
