BufferedReader & BufferedWriter

import java.io.*;
public class TestBufferReader {

	public static void main(String[] args) {
		try{
			BufferedWriter bw = new BufferedWriter(new FileWriter("E:\\sync\\Java\\TestBufferReader\\randomNumber.txt"));
			BufferedReader br = new BufferedReader(new FileReader("E:\\sync\\Java\\TestBufferReader\\randomNumber.txt"));
			
			String str = null;
			
			for(int i = 1; i <= 100; i++){
				str = String.valueOf(Math.random());
				bw.write(str);
				bw.newLine();
			}
			bw.flush();
			
			while((str = br.readLine()) != null){
				System.out.println(str);
			}
			
			bw.close();
			br.close();
		}catch(IOException ioe){
			ioe.printStackTrace();
		}
	}
}

用法上继承了FileXXXstream和FileReader，FileWriter组合。有点意思的是readLine()