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這篇“Java8中Stream流求最大值最小值怎么實(shí)現(xiàn)”文章的知識點(diǎn)大部分人都不太理解,所以小編給大家總結(jié)了以下內(nèi)容,內(nèi)容詳細(xì),步驟清晰,具有一定的借鑒價(jià)值,希望大家閱讀完這篇文章能有所收獲,下面我們一起來看看這篇“Java8中Stream流求最大值最小值怎么實(shí)現(xiàn)”文章吧。
1. stream().reduce()實(shí)現(xiàn)
List<BigDecimal> list = new ArrayList<>(Arrays.asList(new BigDecimal("1"), new BigDecimal("2"))); BigDecimal max = list.stream().reduce(list.get(0), BigDecimal::max); BigDecimal min = list.stream().reduce(list.get(0), BigDecimal::min);
2. stream().max()或stream().min()實(shí)現(xiàn)
List<BigDecimal> list = new ArrayList<>(Arrays.asList(new BigDecimal("1"), new BigDecimal("2"))); BigDecimal max = list.stream().max(Comparator.comparing(x -> x)).orElse(null); BigDecimal min = list.stream().min(Comparator.comparing(x -> x)).orElse(null);
1. stream().reduce()實(shí)現(xiàn)
List<Integer> list = new ArrayList<>(Arrays.asList(1, 2)); Integer max = list.stream().reduce(list.get(0), Integer::max); Integer min = list.stream().reduce(list.get(0), Integer::min);
2. Collectors.summarizingInt()實(shí)現(xiàn)
List<Integer> list = new ArrayList<>(Arrays.asList(1, 2)); IntSummaryStatistics intSummaryStatistics = list.stream().collect(Collectors.summarizingInt(x -> x)); Integer max = intSummaryStatistics.getMax(); Integer min = intSummaryStatistics.getMin();
3. stream().max()或stream().min()實(shí)現(xiàn)
List<Integer> list = new ArrayList<>(Arrays.asList(1, 2)); Integer max = list.stream().max(Comparator.comparing(x -> x)).orElse(null); Integer min = list.stream().min(Comparator.comparing(x -> x)).orElse(null);
1. stream().reduce()實(shí)現(xiàn)
List<Long> list = new ArrayList<>(Arrays.asList(1L, 2L)); Long max = list.stream().reduce(list.get(0), Long::max); Long min = list.stream().reduce(list.get(0), Long::min);
2. Collectors.summarizingLong()實(shí)現(xiàn)
List<Long> list = new ArrayList<>(Arrays.asList(1L, 2L)); LongSummaryStatistics summaryStatistics = list.stream().collect(Collectors.summarizingLong(x -> x)); Long max = summaryStatistics.getMax(); Long min = summaryStatistics.getMin();
3. stream().max()或stream().min()實(shí)現(xiàn)
List<Long> list = new ArrayList<>(Arrays.asList(1L, 2L)); Long max = list.stream().max(Comparator.comparing(x -> x)).orElse(null); Long min = list.stream().min(Comparator.comparing(x -> x)).orElse(null);
1. stream().reduce()實(shí)現(xiàn)
List<Double> list = new ArrayList<>(Arrays.asList(1d, 2d)); Double max = list.stream().reduce(list.get(0), Double::max); Double min = list.stream().reduce(list.get(0), Double::min);
2. Collectors.summarizingLong()實(shí)現(xiàn)
List<Double> list = new ArrayList<>(Arrays.asList(1d, 2d)); DoubleSummaryStatistics summaryStatistics = list.stream().collect(Collectors.summarizingDouble(x -> x)); Double max = summaryStatistics.getMax(); Double min = summaryStatistics.getMin();
3. stream().max()或stream().min()實(shí)現(xiàn)
List<Double> list = new ArrayList<>(Arrays.asList(1d, 2d)); Double max = list.stream().max(Comparator.comparing(x -> x)).orElse(null); Double min = list.stream().min(Comparator.comparing(x -> x)).orElse(null);
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