Stream字符串按數字排序

//對字符串數字排序
Stream.of("123", "321", "132","312").sorted(Comparator.comparingInt(Integer::parseInt))
// 對Object屬性排序
Stream.of(
        new Exception("13"),
        new Exception("1"),
        new Exception("21"),
        new Exception("3")
).sorted(Comparator.comparing(Exception::getMessage, Comparator.comparingInt(Integer::parseInt)));