output

$ java Unicode.java
55356
57331
65039
8205
9895
65039
---
127987
65039
8205
9895
65039
---
127987
65039
8205
9895
65039

Unicode.java

public class Unicode {
  public static void main(String[] args) {
    String foo = "🏳️‍⚧️";
    for (String x : foo.split("")) {
      System.out.println(x.codePointAt(0));
    }
    System.out.println("---");
    int n = foo.codePointCount(0, foo.length());
    for (int i = 0; i < n; ++i) {
      int j = foo.offsetByCodePoints(0, i);
      System.out.println(foo.codePointAt(j));
    }
    System.out.println("---");
    for (int c : foo.codePoints().toArray()) {
      System.out.println(c);
    }
  }
}