代码去掉行号(文件处理、直接处理两种方式)

 

//A1.java

import java.io.*;

public class A1 {

    public static void main(String[] args) {

        BufferedReader br;
        String str;

        try {
            File f = new File("c:\\1.txt");
            br = new BufferedReader(new FileReader(f));
            // br = new BufferedReader(new InputStreamReader(new FileInputStream(f)));
            //            br = new BufferedReader(new InputStreamReader(System.in));
            while ((str = br.readLine()) != null)
                System.out.println(str.substring(3));

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}