其他流（常用非基本流）

//缓冲字节流
import java.io.*;

public class Test01 {
    public static void main(String[] args) throws Exception {
        File f = new File("day20\\b.wmv");
        f.delete();

        FileInputStream fis = new FileInputStream("day20\\a.wmv");
        FileOutputStream fos = new FileOutputStream("day20\\b.wmv");

        BufferedInputStream bis = new BufferedInputStream(fis);
        BufferedOutputStream bos = new BufferedOutputStream(fos);

        long start = System.currentTimeMillis();

        int ch;
        byte[] arr = new byte[1024];
        while ((ch = bis.read(arr)) != -1) {
            bos.write(arr, 0, ch);
        }

        long end = System.currentTimeMillis();

        bos.close();//同时也关闭了它所包装的fos
bis.close();//同时也关闭了它所包装的fis

        //fos.close();
        //fis.close();

System.out.println(end - start);
    }
}

//缓冲字符流
//对每一段以“1.先帝创业...”形式开头的出师表进行排序，输出到一个新文本文件中
import java.io.*;
import java.util.HashMap;

public class Test02 {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new FileReader("day20\\a.txt"));
        HashMap<String,String> hm = new HashMap();
        String ch;
        while ((ch = br.readLine()) != null) {
            String[] split = ch.split("\\.");
            hm.put(split[0], split[1]);
        }

        br.close();

        BufferedWriter bw = new BufferedWriter(new FileWriter("day20\\aa.txt"));

        String key = null;
        for (int i = 1; i <= hm.size(); i++) {
            key = ""+i;
            bw.write(key + "." + hm.get(key));
            bw.newLine();
        }

        bw.close();
    }
}
上一个代码可改写：

import java.io.*;
import java.util.ArrayList;
import java.util.Collections;

public class Test03 {
    public static void main(String[] args) throws Exception {
        FileReader fr = new FileReader("day20\\a.txt");
        BufferedReader br = new BufferedReader(fr);

        ArrayList<String> al = new ArrayList();

        String ch;
        while ((ch = br.readLine()) != null) {
            al.add(ch);
        }

        br.close();

        Collections.sort(al);
        BufferedWriter bw = new BufferedWriter(new FileWriter("day20\\aaa.txt"));
        for (String s : al) {
            bw.write(s);
            bw.newLine();
        }
        bw.close();
    }
}

//打印流，用途不大
import java.io.FileOutputStream;
import java.io.PrintStream;

public class Test06 {
    public static void main(String[] args) throws Exception {
        PrintStream ps = new PrintStream(new FileOutputStream("day20\\d.txt"));
        ps.println(666);
        ps.write(97);
        System.setOut(ps);//改变打印流向
System.out.println(985);
    }
}