Sqids sqids=Sqids.builder().build();
String id=sqids.encode(Arrays.asList(1L,2L,3L)); // "86Rf07"
List<Long> numbers=sqids.decode(id); // [1, 2, 3]

Sqids sqids=Sqids.builder()
  .minLength(10)
  .build();
String id=sqids.encode(Arrays.asList(1L,2L,3L)); // "86Rf07xd4z"
List<Long> numbers=sqids.decode(id); // [1, 2, 3]

Sqids sqids=Sqids.builder()
  .alphabet("k3G7QAe51FCsPW92uEOyq4Bg6Sp8YzVTmnU0liwDdHXLajZrfxNhobJIRcMvKt")
  .build();
String id=sqids.encode(Arrays.asList(1L,2L,3L)); // "XRKUdQ"
List<Long> numbers=sqids.decode(id); // [1, 2, 3]