/*高效流：BufferedReader
              BufferedWriter

*/

public class Demo_3(){
public static void main(String[] args){
//创建对象
Reader     in = new Reader("a.txt");
BufferedReader     br = new   BufferedReader(in);
Writer    out = new  Writer("b.txt");
BufferedWriter     bw = new     BufferedWriter(out);


//定义字符串
String    s = "";
while((s=br.readLine())!=null){
bw.write(s);
}
br.close();
bw.close();
}
}

/*高效流：BufferedReader
              BufferedWriter

*/

public class Demo_3(){
public static void main(String[] args){
//创建对象
Reader     in = new Reader("a.txt");
BufferedReader     br = new   BufferedReader(in);
Writer    out = new  Writer("b.txt");
BufferedWriter     bw = new     BufferedWriter(out);


//定义字符串
String    s = "";
while((s=br.readLine())!=null){
bw.write(s);
}
br.close();
bw.close();
}
}