ThinkJava-输入和输出

package com.java.io;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

public class BufferedInputFile {
    public static String read(String pathname) throws IOException {
        BufferedReader in = new BufferedReader(new FileReader(new File(pathname)));
        String s;
        StringBuilder sb = new StringBuilder();
        while((s = in.readLine())!=null){
            sb.append(s + "\n") ;
        }
        in.close();
        return sb.toString();
    }
    
    public static void main(String[] args) throws IOException {
        System.out.print(read("src/com/java/io/BufferedInputFile.java"));
    }
}