java中讲讲FileReader的用法，举例？

2.2 FileReader的用法 （视频下载） （全部书籍）

FileReader是Reader的继承类，从字面上就可看出，它的主要功能就是能从磁盘上读入文件。read方法会一个一个字符的从磁盘往回读数据。

例：2.2.1

import java.io.*;
public class TestMark_to_win {
    public static void main(String args[]) throws Exception {
        /*public int read()
         throws IOException
Reads a single character.
Overrides:
read in class Reader
Returns:
The character read, or -1 if the end of the stream has been reached
Throws:
IOException - If an I/O error occurs */
        int ii;
        FileReader in = new FileReader("c:/1.txt");
        while ((ii = in.read()) != -1) {
            System.out.println(ii);
        }
        in.close();
        FileReader in1 = new FileReader("c:/1.txt");
        while ((ii = in1.read()) != -1) {

详情请见：http://www.mark-to-win.com/index.html?content=JavaBeginner/javaUrl.html&chapter=JavaBeginner/JavaBeginner8_web.html#UsageOfFileReader