import java.io.BufferedWriter;
import java.io.PrintWriter;

import java.io.FileWriter;

public class WriteFile {    
    public static void main(String[] args) {
        long times = 3000;
        for (int i = 0; i < times; i++) {
            //write1(Integer.toString(i+1));
            write2(Integer.toString(i+1));
        }
        System.out.println("finished!");
    }

    private static void write1(String content) {
        FileWriter fw = null;
        BufferedWriter bw = null;
        try {
            fw = new FileWriter("d:\\1.txt", true);
            bw = new BufferedWriter(fw);
            bw.write(content);
            bw.newLine();
            bw.flush();
            bw.close();
            fw.close();
        } catch (Exception e) {
            // TODO: handle exception
        }
    }
    
    private static synchronized void write2(String content) {
        FileWriter fw = null;
        PrintWriter pw = null;
        try {
            fw = new FileWriter("d:\\2.txt", true);
            pw = new PrintWriter(fw);
            pw.println(content);
            pw.close();
            fw.close();
        } catch (Exception e) {
            // TODO: handle exception
        }
    }
}