String s = "this is → my arrow";
if (s.contains("→")) {
  System.out.println("Contains arrow!");
} else {
  System.out.println("No arrows in my string :(");
}

String s = "this is → my arrow";
if (s.contains("u2192")) {
  System.out.println("Contains arrow!");
} else {
  System.out.println("No arrows in my string :(");
}