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