Java基础之BufferedReader

package cn.itcast.p2.io.charstream.buffer; import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; public class BufferedReaderDemo { /** * @param args * @throws IOException */ public static void main(String[] args) throws IOException { FileReader fr = new FileReader("buf.txt"); BufferedReader bufr = new BufferedReader(fr); String line = null; while((line=bufr.readLine())!=null){ System.out.println(line); } /* String line1 = bufr.readLine(); System.out.println(line1); String line2 = bufr.readLine(); System.out.println(line2); String line3 = bufr.readLine(); System.out.println(line3); String line4 = bufr.readLine(); System.out.println(line4); String line5 = bufr.readLine(); System.out.println(line5); */ bufr.close(); } /** * @throws FileNotFoundException * @throws IOException */ public static void demo() throws FileNotFoundException, IOException { FileReader fr = new FileReader("buf.txt"); char[] buf = new char[1024]; int len = 0; while((len=fr.read(buf))!=-1){ System.out.println(new String(buf,0,len)); } fr.close(); } }