Java 8:stream API Exercises

//Store attribute class public class Property {String name;    Distance, Unit: M Integer distance;    Sales, monthly sales of Integer sales;    Price, here's the simple point of writing a level representing the price segment Integer PriceLevel;        Public Property (String name, int distance, int sales, int pricelevel) {this.name = name;        This.distance = distance;        This.sales = sales;    This.pricelevel = PriceLevel; }public String GetName () {return name;} public void SetName (String name) {this.name = name;} Public Integer getdistance () {return distance;} public void Setdistance (Integer distance) {this.distance = distance;} Public Integer Getsales () {return sales;} public void Setsales (Integer sales) {this.sales = sales;} Public Integer Getpricelevel () {return pricelevel;} public void Setpricelevel (Integer pricelevel) {this.pricelevel = PriceLevel;} @Overridepublic String toString () {return "property [name=" + name + ", distance=" + Distance + ", sales=" + sales + ", PR    Icelevel= "+ pricelevel+"] ";} }

Java8stream it provides enhancements to the set operation unlike I/O public class Testjava8stream {public static void main (string[] args) {/*//stream operation list row Order System.out.println ("=====java8stream operation ============ Method 1 Find the nearest store");    Property P1 = new Property ("Cask Rice", 1000, 500, 2);    Property P2 = new Property ("Braised chicken in yellow sauce", 2300, 1500, 3);    Property P3 = new Property ("McDonald", 580, 3000, 1);    Property P4 = new Property ("KFC", 6000, 200, 4); list<property> properties = Arrays.aslist (P1, p2, p3, p4); String name2 = Properties.stream (). Sorted (Comparator.comparingint (x-x.distance)). Fin DFirst (). get (). Name; System.out.println ("Distance from my nearest shop is:" + name2); *//*system.out.println ("====== traditional Operations List Sort =========== method two find my nearest shop");    Property P1 = new Property ("Cask Rice", 1000, 500, 2);    Property P2 = new Property ("Braised chicken in yellow sauce", 2300, 1500, 3);    Property P3 = new Property ("McDonald", 580, 3000, 1);    Property P4 = new Property ("KFC", 6000, 200, 4); list<property> properties = Arrays.aslist (P1, p2, p3, p4);    Collections.sort (Properties, (x, y), X.distance.compareto (y.distance));    String name = Properties.get (0). Name; System.out.println ("Distance to my nearest store is:" + name); */system.out.println ("===== Iteration =======");    Property P1 = new Property ("Cask Rice", 1000, 500, 2);    Property P2 = new Property ("Braised chicken in yellow sauce", 2300, 1500, 3);    Property P3 = new Property ("WoI McDonald", 580, 3000, 1);    Property P4 = new Property ("KFC", 6000, 200, 4); list<property> properties = Arrays.aslist (P1, p2, p3, p4); int count = 0;//The number of stores sold more than 1000 for the month for (property Property:pro    Perties) {if (Property.sales >) {count++; }}system.out.println ("Number of stores with monthly sales greater than 1000:" +count);//Use internal iterations to calculate long Count2 = Properties.stream (). Filter (P-p.sales >). Count (); System.out.println ("Number of stores with monthly sales greater than 1000:" +count2), Long Count3 =properties.stream (). Filter (P.distance < 1000, p). Count ();//filter out my store within 1000 meters long count4 =properties.stream (). Filter (P, P.name.length () > 5). Count ();// Filter out a store property with a name greater than 5 characters = PropertiEs.stream (). Max (Comparator.comparingint (P-p.pricelevel)). get ();//filter out the lowest price store//get distance to my nearest 2 stores List<property > properties_s = Properties.stream (). Sorted (Comparator.comparingint (x-X.distance)). Limit ( 2). Collect (Collectors.tolist ());//Get the name of all stores list<string> names = Properties.stream (). Map (P-& Gt        p.name). Collect (Collectors.tolist ());//Get the price level of each store map<string, integer> map = Properties.stream () . Collect (Collectors.tomap (Property::getname, property::getpricelevel);//Shop list for all price levels Map<integer, list< property>> Pricemap = Properties.stream (). Collect (Collectors.groupingby (Property::getpricelevel));}}

　　

Java 8:stream API Exercises