java文件输入输出

package lab01;

import java.util.*;
import java.math.*;
import java.io.*;

public class first {
    public static void main(String[] args) {
        String fileName = "E:/eclipse/mywork/in.txt";
        try {
            File file = new File(fileName);

            Scanner workreader = new Scanner(file);
            while (workreader.hasNext()) {
                String nn = workreader.nextLine();
                System.out.println(nn);
            }
//            FileReader fr = new FileReader(fileName);
//            BufferedReader br = new BufferedReader(fr);
//            String line = br.readLine();
//            while (line != null) {
//                System.out.println(line);
//                line = br.readLine();
//            }
        } catch (Exception io) {
            io.printStackTrace();
        }
    }
}