Erroneous tree type: io.bufferedreader at io.reader.main(reader.java:10)

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Java

Code should Use a BufferedReader to read characters from the console.

package io;
import java.io.*; 
class Reader { 
  public static void main(String args[]) throws IOException 
  { 
    char c; 
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 
    System.out.println("Enter characters, 'q' to quit.");
    // read characters 
    do { 
      c = (char) br.read(); 
      System.out.println(c); 
    } while(c != 'q'); 
  } 
}

However gives the error "Erroneous tree type: io.BufferedReader at io.Reader.main(Reader.java:10)"

What I have tried:

changed code several times and searched for error type