Check if the String contains emoji using regex

Question

I am working on a chat application so the thing is one should not be able to send an empty message so for that I did following things

For empty spaces

 private boolean emptySpacecheck(String msg){

    return msg.matches(".*\\w.*");
}

For Special Characters

private boolean specCharcheck(String msg){

        return msg.matches("[$&+,:;=\\\\\\\\?@#|/'<>.^*()%!-]");

    }

Above code works fine if someone tries to send an empty message or message that contains only spaces it shows an error the problem it's showing error when trying to send only emoji as msg. How to check for emoji using regex?

Why use regex? Why not just check `msg.trim().isEmpty()`? – Joshua Taylor Mar 01 '18 at 03:06 — Joshua Taylor, Mar 01 '18 at 03:06

JPCProgrammer · Answer 1 · 2018-03-01T02:59:33.707

0

The solution below isn't the best solution but it works hope it helps and works in your situation.

There we go this fix should work it essentially goes in to the ascii value table checks if the characters are the everyday characters used if not it is either a weird character (not used everyday) or an emoji, hope this works.

  String userinp= userinput;
    for (int i=0;i<userinp.length()-1;i++){
    if (((int)userinp.charAt(i))>0&&((int)userinp.charAt(i))<127)
    System.out.println("not emoji");
    else
    System.out.println("emoji");
    }

edited Mar 01 '18 at 02:59

answered Mar 01 '18 at 02:41

JPCProgrammer

28
8

cannot resolve symbol "contains" – Stackover67 Mar 01 '18 at 02:45
2

I updated the code sorry before it did not work this should work I have tested it. – JPCProgrammer Mar 01 '18 at 03:00

Check if the String contains emoji using regex

1 Answers1