JAVA中I/O流之字符流的使用

import java.io.*;
class test{
public static void main(String args []){
FileReader fr=null;
FileWriter fw=null;
try{
fr =new FileReader("f:/javasrc/from.txt");
fw = new FileWriter("f:/javasrc/to.txt");
char [] buffer =new char [100];
int tem =fr.read(buffer,0,buffer.length);
fw.write(buffer,0,tem);
catch(Exception e){
System.out.print(e);
}
finally{
try{
fr.close();
fw.close();
}
catch(Exception e){
System.out.print(e);
}
}
}
}