java - How to pack 2 long values in one single string and get them back -

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please me ideas, how in java:

input:

long id1 = 123456 (any long value) long id2 = 4490390904 (any long value)

output:

a94dhjfh4990-d49044 (whatever, string)

and then, based on output id1 , id2. so, kind of enconding, hashing. not obvious (like 123456###4490390904) don't want encryption level...
wonder if there can use provided java library (so no 3rd party libraries) or algorithms (code snippets).

update similar : https://github.com/peet/hashids.java

a shot in dark, since not precise on requirements. following provides 2 functions encode both value in string , decode string array of long. each long value formatted in hexadecimal.

public class idencoder {      static final string sep = "-";      public static string encode(long id1, long id2) {         return long.tohexstring(id1)+sep+long.tohexstring(id2);     }      // assume paramater @ right format.     // several exceptions can thrown. add exception handling necessary...     public static long[] decode(string id) {         string[] ids = id.split(sep);         long[] idl = new long[2];         idl[0] = long.parseunsignedlong(ids[0], 16);         idl[1] = long.parseunsignedlong(ids[1], 16);         return idl;     }      public static void main(string[] args) {          string ids = encode(123456, 675432187);         system.out .println(ids);         long[] idl = decode(ids);         system.out .println(arrays.tostring(idl));     } }

prints

1e240-284246fb
[123456, 675432187]


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