java小程序 消除代碼前的行號

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {

    public static void main(String[] args) throws IOException {
        Scanner sc = new Scanner(System.in);
        // 此處亦可使用命令行參數讀入，這裏用stdin讀入
        Pattern pattern = Pattern.compile("\\n\\d{1,3}\\b");
        while (sc.hasNext()) {
            StringBuilder txtin = new StringBuilder();
            String path = sc.next();
            BufferedReader bfr = null;
            try {
                bfr = new BufferedReader(new InputStreamReader(new FileInputStream(path), "gbk"));
            } catch (UnsupportedEncodingException e) {
                System.out.println("不支持該文件的字符 文件路徑:" + path);
            } catch (FileNotFoundException e) {
                System.out.println("在該路徑下未找到文件 :" + path);
            } finally {
                if (bfr == null)
                    continue;
            }
            while (!bfr.ready()) {
                // 沒準備好讀取就阻塞住
            }
            while (bfr.ready()) {
                String temp = bfr.readLine();
                txtin.append(temp+'\n');
            }
            Matcher m=pattern.matcher(txtin);
            String result=m.replaceAll(System.getProperty("line.separator"));
            String location=("C:\\Users\\51396\\Desktop\\"+new Date().getTime()+".txt");
            System.out.println(location);
            File file=new File(location);
            file.createNewFile();
            PrintStream ps=new PrintStream(file);
            ps.println(result);
            ps.close();
            try {
                bfr.close();
            } catch (IOException e) {
                System.out.println("文件關閉失敗");
            }
        }
        sc.close();
    }
}

文章內容尚待更新，在Windows下測試完畢，等考完試有空再來博客謝謝