### Question:
Num62 { public static String longToN62(long l) { return longToNBuf(l, N62_CHARS).reverse().toString(); }  static String longToN62(long l); static String longToN36(long l); static String longToN62(long l, int length); static String longToN36(long l, int length); static long n62ToLong(String n62); static long n36ToLong(String n36); static final char[] N62_CHARS; static final char[] N36_CHARS; static final int LONG_N36_LEN; static final int LONG_N62_LEN; }### Answer:
@Test public void testLongToN62() throws Exception { assertEquals(Num62.longToN62(Long.MAX_VALUE), "AzL8n0Y58m7"); }