import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class BufferedRW9_11 
{
	public static void main(String args[]) throws IOException 
	{
		FileReader file_in=new FileReader("C:\\example\\file4.txt");
		BufferedReader buf_in=new BufferedReader(file_in);
		FileWriter file_out=new FileWriter("C:\\example\\file5.txt");
		BufferedWriter buf_out=new BufferedWriter(file_out);
		String str="";
		int k=1;
		while((str=buf_in.readLine())!=null)	
		{
			buf_out.write("第"+k+"行内容:"+str);
			buf_out.newLine();
			k++;
		}
		buf_out.flush();
		buf_out.close();
		file_out.close();
		buf_in.close();
		file_in.close();
	}
}