import java.io.BufferedInputStream; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; public class qukonghang {     private static String filename1;     private static String filename2;     public static void main(String[] args) {         filename1="file1";         filename2="file2";         File file=new File(filename1);         InputStream is=null;         BufferedReader br = null;         String tmp;         FileWriter writer=null;         int i=0;         try {             is=new BufferedInputStream(new FileInputStream(file));             br = new BufferedReader(new InputStreamReader(is, "utf-8"));             writer = new FileWriter(filename2, true);             while((tmp=br.readLine())!=null){                 if(tmp.equals(""));                 else{                     writer.write(tmp+"\n");                     i++;                     System.out.println(i);                 }             }             writer.close();             is.close();         } catch (IOException e) {             e.printStackTrace();         }     } }