JavaSE-19.2.3【案例-复制Java文件（打印流改进版）】 

 1 package day10.lesson2;
 2 
 3 import java.io.*;
 4 
 5 /*
 6 2.5 案例-复制Java文件（打印流改进版）
 7  */
 8 public class CopyJavaDemo {
 9     public static void main(String[] args) throws IOException {
10         /*BufferedReader br = new BufferedReader(new FileReader("stage2\\src\\day10\\lesson2\\SystemInAndOutDemo.java"));
11         BufferedWriter bw = new BufferedWriter(new FileWriter("stage2\\day9_lesson2_copy\\CopySystemInAndOutDemo.java"));
12 
13         String line;
14         while ((line=br.readLine()) != null){
15             bw.write(line);
16             bw.newLine();
17             bw.flush();
18         }
19 
20         bw.close();
21         br.close();*/
22 
23         //打印流改进
24         BufferedReader br = new BufferedReader(new FileReader("stage2\\src\\day10\\lesson2\\SystemInAndOutDemo.java"));
25         PrintWriter pw = new PrintWriter(new FileWriter("stage2\\day9_lesson2_copy\\CopySystemInAndOutDemo.java"), true);
26 
27         String line;
28         while ((line=br.readLine()) != null){
29             pw.println(line);
30         }
31 
32         pw.close();
33         br.close();
34     }
35 }

 

posted @ 2021-06-08 12:28  yub4by  阅读(51)  评论(0)    收藏  举报