1     InputStream in = System.in; 2      3     System.out.println("int read(byte b) 方法演示"); 4     //int read() 5     int bt = 0; 6     while((bt=in.read())>0){     7         System.out.print(bt+" "); 8         if(bt == 10){    //回车\r(13) 换行\n(10) 9             break;10         }11     }12     System.out.println("\n\rint read(byte[] buffer) 方法演示");13 14     //int read(byte[] buffer)15     int length = 0;16     byte[] buffer = new byte[10];17     while((length=in.read(buffer)) != 0){18         for(int i=0; i<length; i++){19             System.out.print(buffer[i]+" ");20         }21         break;22     }23     24     System.out.println("\n\rint read(byte[] buffer, int offset, int len) 方法演示");25     26     //int read(byte[] buffer, int offset, int len)27     int len = 1024;28     int count = 0;29     byte[] buf = new byte[len];30     while((count=in.read(buf, 0, len))>0){31         for(int i=0; i<count; i++){32             System.out.print(buf[i]+" ");33         }34         break;35     }36     in.close();

 1     OutputStream out = System.out; 2     //void write(int b) 3     out.write(65);    //字符A 4      5     out.write(13);    //回车 \r 6     out.write(10);    //换行 \n 7      8     //flush() 9     out.flush();10     11     //write(byte[] bytes)12     byte[] bytes = new String("张晓明").getBytes();13     out.write(bytes);14     15     out.write(13);    //回车 \r16     out.write(10);    //换行 \n17     18     //write(byte[] bytes, int offset, int length)19     bytes = new String("zhangxiaoming").getBytes();20     out.write(bytes, 5, 8);21     22     out.close();

 1     Reader reader = new InputStreamReader(System.in); 2      3     //int read() 4     System.out.println("int read() 方法演示"); 5     int c; 6     while((c=reader.read()) != 13){ 7         System.out.print((char)c); 8     } 9     reader.read();10     11     //int read(char[] buf)12     System.out.println("\n\rint read(char[] buf) 方法演示");13     int count = 0;14     char[] buf = new char[1024];15     while((count=reader.read(buf)) > 0){16         String str = new String(buf, 0, count);17         if(str.indexOf("stop")>=0) break;18         System.out.print(str);19     }20     21     //int read(char[] buffer, int offset, int len)22     System.out.println("\n\rint read(char[] buffer, int offset, int len) 方法演示");23     int length = 1024;24     char[] buffer = new char[length];25     while((count=reader.read(buffer, 0, length)) > 0){26         String str = new String(buffer, 0, count);27         if(str.indexOf("stop")>=0) break;28         System.out.print(str);29     }

 1     Writer writer = new OutputStreamWriter(System.out); 2     String str = "中国"; 3      4     //write(String str) 写入字符串 5     writer.write(str); 6      7     //write(int c)    写入单个字符 8     writer.write(10);    //换行符 9     10     //write(String str, int offset, int length) 写入部分字符串11     writer.write(str, 0, 1);12     13     writer.write(10);14     15     //write(char[] buf)    写入字符数组16     char[] chars = str.toCharArray();17     writer.write(chars);18     19     writer.write(10);20     21     //write(char[] buf, int offset, int length) 写入部分字符数组22     writer.write(chars, 0, 1);23     writer.write(10);24     25     writer.flush();26     27     //append(char c) 追加字符28     writer.append(‘z‘);29     writer.write(10);30     31     String str2 = "中华人民共和国";32     //append(CharSequence csq)33     writer.append(str2);34     writer.write(10);35     36     //append(CharSequence csq, int offset, int length)37     writer.append(str2, 0, 4);38     39     writer.close();