UnsignedNumberUtil { public static String unsignedIntToString(int x) { return unsignedIntToString(x, 10); } private  UnsignedNumberUtil(); static int parseUnsignedInt(String s); static String unsignedIntToString(int x); static long parseUnsignedLong(String s); static String unsignedLongToString(long x); static final long MAX_VALUE; }
@Test public void testUnsignedIntToString() throws Exception { Assert.assertEquals("4294967295", UnsignedNumberUtil.unsignedIntToString(-1)); }