From 0fb33319d75f9764b78cc42d261888277e7e4725 Mon Sep 17 00:00:00 2001
From: koz01 <koz01@PCCPIT1V203-040.msad.vsb.cz>
Date: Mon, 14 Nov 2022 12:14:38 +0100
Subject: [PATCH] solution
---
src/main/java/cz/jezek/lab11/Match.java | 8 +++-
src/main/java/cz/jezek/lab11/Oponents.java | 8 +++-
src/main/java/cz/jezek/lab11/Player.java | 8 +++-
src/main/java/cz/jezek/lab11/StreamMain.java | 49 +++++++++++++++++---
src/main/java/cz/jezek/lab11/Tournament.java | 36 ++++++++++----
5 files changed, 92 insertions(+), 17 deletions(-)
diff --git a/src/main/java/cz/jezek/lab11/Match.java b/src/main/java/cz/jezek/lab11/Match.java
index 00f2851..f5b8bb6 100644
--- a/src/main/java/cz/jezek/lab11/Match.java
+++ b/src/main/java/cz/jezek/lab11/Match.java
@@ -1,9 +1,15 @@
package cz.jezek.lab11;
+import java.io.Serializable;
import java.util.Objects;
-public class Match {
+public class Match implements Serializable{
+ /**
+ *
+ */
+ private static final long serialVersionUID = -7368303036334738923L;
+
private Oponents oponents;
private int player1Scorel;
private int player2Scorel;
diff --git a/src/main/java/cz/jezek/lab11/Oponents.java b/src/main/java/cz/jezek/lab11/Oponents.java
index 1de0f68..afc5a80 100644
--- a/src/main/java/cz/jezek/lab11/Oponents.java
+++ b/src/main/java/cz/jezek/lab11/Oponents.java
@@ -1,9 +1,15 @@
package cz.jezek.lab11;
+import java.io.Serializable;
import java.util.Objects;
-public class Oponents {
+public class Oponents implements Serializable{
+ /**
+ *
+ */
+ private static final long serialVersionUID = 1L;
+
private Player player1;
private Player player2;
diff --git a/src/main/java/cz/jezek/lab11/Player.java b/src/main/java/cz/jezek/lab11/Player.java
index 2a27b1b..f0fe5ef 100644
--- a/src/main/java/cz/jezek/lab11/Player.java
+++ b/src/main/java/cz/jezek/lab11/Player.java
@@ -1,7 +1,13 @@
package cz.jezek.lab11;
-public class Player {
+import java.io.Serializable;
+public class Player implements Serializable {
+
+ /**
+ *
+ */
+ private static final long serialVersionUID = 1L;
private String firstName;
private String lastName;
diff --git a/src/main/java/cz/jezek/lab11/StreamMain.java b/src/main/java/cz/jezek/lab11/StreamMain.java
index ea4babc..4eb29ae 100644
--- a/src/main/java/cz/jezek/lab11/StreamMain.java
+++ b/src/main/java/cz/jezek/lab11/StreamMain.java
@@ -1,14 +1,21 @@
package cz.jezek.lab11;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.util.Comparator;
+import java.util.stream.Collectors;
+
public class StreamMain {
public static void main(String[] args) {
- Tournament tournament = Tournament.generate();
+ Tournament tournament = loadTournament();
printStatAboutTournament(tournament);
saveTournament(tournament);
- loadTournament();
}
public static void printStatAboutTournament(Tournament tournament) {
@@ -21,6 +28,11 @@ public class StreamMain {
System.out.print("Goals scored: ");
//TODO 3.b Show the number of goals scored by a given player (help Streams)
+ System.out.println(tournament.getMatches().stream()
+ .filter( m -> m.getOponents().contains(player))
+ .map(m -> m.getScoreForPlayer(player))
+ .mapToInt(score -> score.intValue())
+ .sum());
Oponents oponents = new Oponents(tournament.getRandomPlayer(),
tournament.getRandomPlayer());
@@ -30,15 +42,40 @@ public class StreamMain {
//TODO 4.a List the matches played between the given players (using the stream)
System.out.print("Number of mathes: ");
//TODO 4.b Print the number of matches played between the given players (using the stream)
- System.out.print("Match with the largest total number:");
+ final String tournamentName = tournament.getMatches().stream().filter(m -> m.getOponents().equals(oponents))
+ .sorted(Comparator.<Match>comparingInt(m -> m.getPlayer1Scorel() + m.getPlayer2Scorel()).reversed())
+ .map(Object::toString).findFirst().orElse("N/A");
+
+ System.out.println("Match with the largest total number: " + tournamentName);
+
+
+ //TODO 4.b Print the number of matches played between the given players (using the stream)
+ final String tournamentName2 = tournament.getMatches().stream().filter(m -> m.getOponents().equals(oponents))
+ .collect(Collectors.maxBy(Comparator.comparingInt(m -> m.getPlayer1Scorel() + m.getPlayer2Scorel())))
+ .map(Object::toString)
+ .orElse("N/A");
+
+ System.out.println("Match with the largest total number: " + tournamentName2);
//TODO 4.c Show match with the largest total number (sum of both players) scored goals between relevant players (help Streams)
+
}
- public static void loadTournament() {
- //TODO 5.b Load a serialized tournament from a file
+ public static Tournament loadTournament() {
+ try(ObjectInputStream ois = new ObjectInputStream(new FileInputStream("data.obj"))) {
+ return (Tournament) ois.readObject();
+ } catch (IOException e) {
+ e.printStackTrace();
+ } catch (ClassNotFoundException e) {
+ e.printStackTrace();
+ }
+ return null;
}
public static void saveTournament(Tournament tournament) {
- //TODO 5.a Save the tournament to a file using object serialization.
+ try(ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("data.obj"))) {
+ oos.writeObject(tournament);
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
}
}
diff --git a/src/main/java/cz/jezek/lab11/Tournament.java b/src/main/java/cz/jezek/lab11/Tournament.java
index 3f22efc..7831cdc 100644
--- a/src/main/java/cz/jezek/lab11/Tournament.java
+++ b/src/main/java/cz/jezek/lab11/Tournament.java
@@ -1,19 +1,33 @@
package cz.jezek.lab11;
-import java.util.Collections;
+import static cz.jezek.lab11.RandomGenerator.random;
+import static cz.jezek.lab11.RandomGenerator.selectRandom;
+
+import java.io.Serializable;
import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
-public class Tournament {
+public class Tournament implements Serializable{
+ private static final long serialVersionUID = 1L;
+
private List<Player> players;
private List<Match> matches;
public static Tournament generate() {
// TODO 1.a Generate a list of 10 random players using the stream and then filter so that it does not contain players with the same name
- List<Player> players = Collections.emptyList();
+ List<Player> players =
+ Stream.generate(Player::generateRandom)
+ .distinct()
+ .limit(10)
+ .collect(Collectors.toList());
- // TODO 1.b Use the stream to generate a list of 50 matches between random players (from the list of players) with a random result. Make sure the player does not play with himself.
- List<Match> matches = Collections.emptyList();
+ // TODO 1.b Use the stream to generate a list of 500 matches between random players (from the list of players) with a random result. Make sure the player does not play with himself.
+ List<Match> matches = Stream.generate(() -> generateRandomMatch(players))
+ .filter(m -> m.getOponents().getPlayer1() != m.getOponents().getPlayer2())
+ .limit(500)
+ .collect(Collectors.toList());
return new Tournament(players, matches);
@@ -33,7 +47,7 @@ public class Tournament {
}
public Player getRandomPlayer() {
- return RandomGenarator.selectRandom(players);
+ return RandomGenerator.selectRandom(players);
}
@Override
@@ -45,13 +59,19 @@ public class Tournament {
builder.append("\n\nPlayers:\n");
// TODO 2.a Use the stream to add a listing of all players to the builder. Individual players are separated by a "\ n" character
- builder.append(/* list of all players */"");
+ players.stream().map(Object::toString).forEach(name -> builder.append(name).append(",\n"));
+
builder.append("\n\nMatches:\n");
// TODO 2.b Use the stream to add a listing of all entries to the builder. Individual matches are separated by a "\ n" character
- builder.append(/* list of all matches */"");
+ builder.append(matches.stream().map(Object::toString).collect(Collectors.joining(",\n")));
return builder.toString();
}
+
+
+ private static Match generateRandomMatch(List<Player> players) {
+ return new Match(selectRandom(players), random.nextInt(11), selectRandom(players), random.nextInt(11));
+ }
}
--
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