Java关于JDK1.8新特性的Stream流

 List<String> stringList = Arrays.asList("abc", "", "bc", "efg", "abcd", "");
        List<String> strings = stringList.stream().filter(string -> StringUtils.isNotBlank(string)).collect(Collectors.toList());
  System.out.println("*********过滤后的集合是"+strings);

 strings.forEach(System.out::println);

 Random random = new Random();
        random.ints().limit(10).forEach(System.out::println);

vList<Integer> numbers = Arrays.asList(3, 2, 2, 3, 7, 3, 5, 8, 9);
        //获取对应的平方数
        List<Integer> integers = numbers.stream().map(i -> i * i).distinct().collect(Collectors.toList());
        System.out.println("*********获取对应的平方数"+integers);

        List<Integer> orgList = Arrays.asList(10, 9, 8, 7, 6, 13, 16, 0, 1, 2);
        List<Integer> sortedList = orgList.stream().sorted().collect(Collectors.toList());
        System.out.println("*********排序后集合是"+sortedList);

 List<String> emptyList = Arrays.asList("abc", "", "bc", "efg", "abcd", "", "");
        //获取空字符串的数量
        long count = emptyList.parallelStream().filter(string -> string.isEmpty()).count();
        System.out.println("*****集合中的空字符串个数=" + count);

 List<String> orgCollectors = Arrays.asList("abc", "", "bc", "efg", "abcd", "", "jkl");
        List<String> filtered = orgCollectors.stream().filter(string -> !string.isEmpty())
                .collect(Collectors.toList());
        System.out.println("筛选列表：" + filtered);

        String mergedString = stringList.stream().filter(string -> !string.isEmpty()).collect(Collectors.joining(","));
        System.out.println("合并字符串：" + mergedString);

 //统计
            List<Integer> orgNums = Arrays.asList(3, 2, 2, 3, 7, 3, 5);
            IntSummaryStatistics statistics = numbers.stream().mapToInt((x) -> x).summaryStatistics();
            System.out.println("列表中最大的数：" + statistics.getMax());
            System.out.println("列表中最小的数：" + statistics.getMin());
            System.out.println("所有数之和：" + statistics.getSum());
            System.out.println("平均数：" + statistics.getAverage());

 Map<Integer, String> disableFlagMap = Arrays.stream(DisableFlagEnum.values()).collect(Collectors.toMap(p -> p.getCode(), p -> p.getDesc()));

public enum DisableFlagEnum {
    NORMAL(0, "正常"),

    DELETE(1, "已删除");

    private Integer code;

    private String desc;

    DisableFlagEnum(Integer code, String desc) {
        this.code = code;
        this.desc = desc;
    }

    public Integer getCode() {
        return code;
    }

    public String getDesc() {
        return desc;
    }
 
    public static String getDesc(Integer code) {
        Map<Integer, String> disableFlagMap = Arrays.stream(DisableFlagEnum.values()).collect(Collectors.toMap(p -> p.getCode(), p -> p.getDesc()));
        return disableFlagMap.get(code);
    }
}