处理流之转换流

import java.io.*;

public class Test {
    public static void main(String[] args) {
        try {
            OutputStream opt = new FileOutputStream("e:\\java\\aaa.txt");
            OutputStreamWriter optw = new OutputStreamWriter(opt);
            BufferedWriter bw = new BufferedWriter(optw);
            String str = "Apple";
            bw.write(str);//直接写入一个字符串
            bw.newLine();//写入分行符
            bw.write("MicroSoft");
            bw.flush();
            InputStream is = new FileInputStream ("e:\\java\\aaa.txt");
            InputStreamReader inputr= new InputStreamReader(is);
            BufferedReader br= new BufferedReader(inputr);
            System.out.println(br.readLine());
        }catch(IOException e){
            e.printStackTrace();    
        }
    }    
}