自定义BufferedReader的实例

public class MyBufferedReader {
 private FileReader fr;
 
 private char[] buff = new char[1024];
 
 private int zz = 0;
 
 private int count = 0;
 
 MyBufferedReader(FileReader fr){
  this.fr = fr;
 }
 
 public int MyRead() throws IOException{
 if(count==0){
  count = fr.read(buff);
   zz =0;
 }
 if(count<0)
  return -1;
 
 char ch = buff[zz++];
 
 count--;
 return ch;
 
}
 public String MyReadLine() throws IOException{
  StringBuilder stb = new StringBuilder();
   
  int ch = 0;
  while((ch=MyRead())!=-1){
   
   if(ch=='\r')
    continue;
   if(ch=='\n')
    return stb.toString();
   
   stb.append((char)ch);
   
  }
  if(stb.length()!=0)
   return stb.toString();
  return null;
 }
 public void MyClose() throws IOException{
  fr.close();
 }
}