<awangdev>Evaluate Reverse Polish Notation_1.java
private boolean isOperator(String s) {

        if (s.length() != 1) return false;
        char c = s.charAt(0);
        return c == '+' || c == '-' || c == '/' || c == '*';
    }
private boolean var_0 ( String var_2 ) {
  if ( var_2 . length ( ) != 1 ) return false ;
  char var_7 = var_2 . charAt ( 0 ) ;
  return var_7 == '+' || var_7 == '-' || var_7 == '/' || var_7 == '*' ;
}
