读取键盘录入

 1 /*
 2 
 3 通过键盘录入一行数据并打印其大写.
 4 
 5 */
 6 import java.io.*;
 7 
 8 class  TransStreamDemo
 9 {
10     public static void main(String[] args) throws IOException
11     {
12         //获取键盘录入对象。
13         //InputStream in = System.in;
14 
15         //将字节流对象转成字符流对象，使用转换流。InputStreamReader
16         //InputStreamReader isr = new InputStreamReader(in);
17 
18         //为了提高效率，将字符串进行缓冲区技术高效操作。
19 
20         //BufferedReader bufr = new BufferedReader(isr);
21 
22 
23         //键盘的最常见写法。
24         BufferedReader bufr = 
25                 new BufferedReader(
26                        new InputStreamReader(System.in));
27 
28 
29 
30 
31 
32         
33 //      OutputStream out = System.out;
34 //      OutputStreamWriter osw = new OutputStreamWriter(out);
35 //      BufferedWriter bufw = new BufferedWriter(osw);
36         BufferedWriter bufw = 
37                 new BufferedWriter(
38                        new OutputStreamWriter(System.out));
39 
40 
41 
42 
43         String line = null;
44 
45         while((line=bufr.readLine())!=null)
46         {
47             if("over".equals(line))
48                 break;
49             bufw.write(line.toUpperCase());
50             bufw.newLine();
51             bufw.flush();
52         }
53 
54         bufr.close();
55 
56     }
57 }