java输入输出18：IO字节流（将文件中的数据倒序输出）

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package zifu;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;

public class Demo5_Reverse {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new FileReader("11.txt"));
		BufferedWriter bw = new BufferedWriter(new FileWriter("reverse.txt"));
		ArrayList<String> list = new ArrayList<>();
		String str = null;
		while ((str = br.readLine()) != null) {
			list.add(str);
		}
		
		for (int i = list.size() -1; i >= 0; i--) {
			bw.write(list.get(i));
			bw.newLine();
		}
		br.close();
		bw.close();
	}
}