震旦小读者的博客

简单的枚举类： public enum PlaceCode { PLACE_CODE_BZHKD("10", "大学"), PLACE_CODE_KC("11", "高中") ; private String code; private String value; PlaceCode(String code, String value) { this.code = code; this.value = value

java.util List<Integer> numList = new ArrayList<>(); Integer max = Collections.max(numList);