java中FileReader和FileWriter类用法

Reader和Writer是所有字符流类的抽象基类，用于简化对字符串的输入输出编程，即用于读写文本数据

实例：

import java.io.*;public class FileReaderWriterTest {public static void main(String [] args) {try {FileWriter writer = new FileWriter("hello.txt");writer.write("love_snooker");writer.close();FileReader reader = new FileReader("hello.txt");char[] buf = new char[12];int len = reader.read(buf);System.out.println(new String(buf, 0, len));} catch (Exception e) {e.printStackTrace();}}}

其它函数用法请参照jdk帮助文档