Steam是中间操作         筛选和切片：         fileter--接收lambda，从流中排除某种元素          limit--截断流，使其元素不超过给定数量         skip--跳过元素，返回一个扔掉了前n个元素的流，若流中元素不足n个，则返回一个空流                  排序：         sorted(Comparable)--自然排序         sorted(Comparator)--定制排序 static List<Employee> emps = Arrays.asList(             new Employee(102,"张三", 18, 3333.33),             new Employee(101,"李四", 38, 4444.44),             new Employee(104,"王五", 50, 5555.55),             new Employee(104,"王五", 50, 5555.55),             new Employee(103,"赵六", 16, 6666.66),             new Employee(105,"田七", 28, 7777.77)     );     public static void main(String[] args) {         //1.获取流         Stream<Employee> stream = emps.stream();         //2.中间操作         Stream<Employee> stream1 = stream                 .filter(e->{                     //System.out.println("--中间过滤操作--->"+e);                     return e.getAge()>=18;                 })                 .distinct()  //去重                 //.limit(3)                 //.skip(1)                 //.sorted();  //默认根据内部比较器                 .sorted((x,y)->Double.compare(y.getPrice(), x.getPrice()));         //3.终止行为         stream1.forEach(System.out::println);     }