BufferedInputStream和BufferedOutputStream

package javaBasic;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
/**
 * BufferedInputStream(FileInputStream in)
 * BufferedOutputStream(FileOutputStream out)
 * 可以提高性能
 * @author markGao
 *
 */
public class BufferedStreamDemo {
    public static void main(String[] args) throws IOException {
        // BufferedInputStream普通写法
        String file = "out.txt";
        InputStream ins = new FileInputStream(file);
        BufferedInputStream bufin = new BufferedInputStream(ins);
        int b;
        while ((b = bufin.read()) != -1) {
            System.out.println(Integer.toHexString(b));
        }
        // 常用写法，只要用到FileInputStream的地方都可以套一个BufferedInputStream用来提升性能
        @SuppressWarnings("unused")
        BufferedInputStream in = new BufferedInputStream(new FileInputStream(
                "out.txt"));

        // BufferedOutputStream
        BufferedOutputStream out = new BufferedOutputStream(
                new FileOutputStream("out.txt"));
        out.write(65);
    }
}