JAVA中I/O流之节点流、处理流的使用

import java.io.*;
class test{
public static void main(String args []){
FileReader filereader=null;
BufferedReader bufferedreader=null;
try{
filereader = new FileReader("f:/javasrc/from.txt");
bufferedreader=new BufferedReader(filereader);
String line =null;
while(true){
line=bufferedreader.readLine();
if(line == null)
{
break;
}
System.out.println(line);
}
}
catch(Exception e){
System.out.print(e);
}
finally{
try{
filereader.close();
bufferedreader.close();
}
catch(Exception e){
System.out.print(e);
}
}
}
}