摘要：List<String> stringList = Lists.newArrayList(); stringList.add("3"); stringList.add("1"); stringList.add("5"); stringList.add("2"); Collections.revers 阅读全文

摘要：@Test public void myTest1(){ List<Role> list = Lists.newArrayList(); list.add(new Role(1,"张三")); list.add(new Role(2,"李四")); list.add(new Role(1,"王五") 阅读全文

摘要：List<Integer> list = dockAlarmParameterList.stream().map(dockAlarmParameter -> dockAlarmParameter.getSystemId()).collect(Collectors.toList()); 阅读全文

摘要：基础类型List排序 List<Integer> list = Arrays.asList(3,1,5,8,6,10); log.info("未排序的list:{}",list); //升序 list.sort(Comparator.naturalOrder()); log.info("升序的lis 阅读全文

摘要：最大、最小值 Double max = doubleList.stream().max(Comparator.comparingDouble(Double::doubleValue)).orElse(null); Double min = doubleList.stream().min(Compar 阅读全文