总结:掌握流。缓冲区类的方法
package com.b; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; public class Mark { public static void main(String[] args) throws Exception { Stream st = new Stream("log.txt"); } } class Stream { public Stream(String pathName) throws Exception { BufferedReader buf = new BufferedReader(new FileReader(new File( pathName))); String line = buf.readLine(); while (line != null) { System.out.println(line); line = buf.readLine(); } buf.close(); } }