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();   }  } }