java - End of file NullPointerException -

what wanted reach eof typing ctrl + z command line bufferedreader reading console. following code so. problem is, issues nullpointerexception after reaching eof. there way skip exception? or more precisely, proper way of reaching eof bufferedreader reading console?

import java.io.bufferedreader; import java.io.ioexception; import java.io.inputstreamreader;  class eof {      public static void main(string args[]) {         string s = "";         string eof = "^z";         bufferedreader read = new bufferedreader(new inputstreamreader(system.in));         try {             while (!s.equals(eof)) {                 s = read.readline();                }         } catch (ioexception e) {}      }  } 

or more precisely, proper way of reaching eof bufferedreader reading console?

currently you're detecting characters '^' , 'z' it's not '^' control character.

the exception you're getting hint how should handling this. docs bufferedreader.readline:

returns:
string containing contents of line, not including line-termination characters, or null if end of stream has been reached

so should loop until readline returns null.

string line; while((line = read.readline()) != null) {     // line }