java regex, matching math operators

Question

I am trying to write a regex to match math operators to a char. I've tried a bunch of different things but i keep getting:

Syntax error on tokens, Expression expected instead

my code looks like this:

public static void readMath(char c) {
        if(c == [+\-*/]) {
            // do some stuff
        }
    }

i've tried escaping different things etc etc. i can't seem to get it to work.

Answer 1

public static void readMath( char c ) {
    if ( String.valueOf( c ).matches( "[-+*/]" ) ) {
        // do stuff
    }
}