Buffer stream and transform stream

import java.io.*;

public class Test1 {
    public static void main(String[] args) throws Exception {
        // Buffer flow 
        InputStream in=new FileInputStream("");
        BufferedInputStream bin=new BufferedInputStream(in);

        OutputStream os=new FileOutputStream("");
        BufferedOutputStream osn=new BufferedOutputStream(os);
        
        Reader reader=new FileReader("");
        BufferedReader bufferedReader=new BufferedReader(reader);
        bufferedReader.readLine();// Read a row of data 
        
        Writer writer=new FileWriter("");
        BufferedWriter writer1=new BufferedWriter(writer);
        writer1.newLine();// Line feed operation 
        
        // Character input conversion stream 
        InputStream inputStream=new FileInputStream("");
        Reader inputStreamReader=new InputStreamReader(inputStream);
        // Character output conversion stream 
        OutputStream outputStream=new FileOutputStream("");
        Writer writer2=new OutputStreamWriter(outputStream,"GBK");
        
    }
}