[Add] new strategy

src/main/java/com/github/tiennm99/lotterygenerator/Main.java

@@ -3,8 +3,8 @@ package com.github.tiennm99.lotterygenerator;
 public class Main {
 
   public static void main(String[] args) {
-    var generator = new NormalLotteryGenerator();
-    var result = generator.generateNumbers(45, 6);
+    var generator = new TopMatchedNumberInCaseLotteryGenerator();
+    var result = generator.generateNumbers(55, 7);
     System.out.println(result);
   }
 }

src/main/java/com/github/tiennm99/lotterygenerator/TopMatchedNumberInCaseLotteryGenerator.java

@@ -0,0 +1,48 @@
+package com.github.tiennm99.lotterygenerator;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.TreeMap;
+import java.util.stream.Collectors;
+
+public class TopMatchedNumberInCaseLotteryGenerator implements LotteryGenerator {
+
+  public static final int DEFAULT_RANDOM_TIME = 1_000_000;
+  private final int randomTime;
+  private final LotteryGenerator generator;
+
+  public TopMatchedNumberInCaseLotteryGenerator(int randomTime, LotteryGenerator generator) {
+    this.randomTime = randomTime;
+    this.generator = generator;
+  }
+
+  public TopMatchedNumberInCaseLotteryGenerator(int randomTime) {
+    this(randomTime, new NormalLotteryGenerator());
+  }
+
+  public TopMatchedNumberInCaseLotteryGenerator(LotteryGenerator generator) {
+    this(DEFAULT_RANDOM_TIME, generator);
+  }
+
+  public TopMatchedNumberInCaseLotteryGenerator() {
+    this(DEFAULT_RANDOM_TIME);
+  }
+
+  @Override
+  public Set<Integer> generateNumbers(int totalNumber, int numNumber) {
+    Map<Integer, Integer> matchedNumbers = new HashMap<>();
+    for (int i = 0; i < randomTime; i++) {
+      var numbers = generator.generateNumbers(totalNumber, numNumber);
+      for (var number : numbers) {
+        matchedNumbers.merge(number, 1, Integer::sum);
+      }
+    }
+    var sortedMatchedNumbers = new TreeMap<Integer, Integer>();
+    matchedNumbers.forEach((key, value) -> sortedMatchedNumbers.put(value, key));
+    System.out.println(sortedMatchedNumbers);
+    return sortedMatchedNumbers.descendingMap().entrySet().stream().limit(numNumber)
+        .map(Entry::getValue).collect(Collectors.toSet());
+  }
+}

src/main/java/com/github/tiennm99/lotterygenerator/TopMatchedNumberLotteryGenerator.java

@@ -8,16 +8,16 @@ import java.util.TreeMap;
 import java.util.concurrent.ThreadLocalRandom;
 import java.util.stream.Collectors;
 
-public class TopMatchedLotteryGenerator implements LotteryGenerator {
+public class TopMatchedNumberLotteryGenerator implements LotteryGenerator {
 
   public static final int DEFAULT_MATCH_TIME = 1_000_000;
   private final int matchTime;
 
-  public TopMatchedLotteryGenerator(int matchTime) {
+  public TopMatchedNumberLotteryGenerator(int matchTime) {
     this.matchTime = matchTime;
   }
 
-  public TopMatchedLotteryGenerator() {
+  public TopMatchedNumberLotteryGenerator() {
     this(DEFAULT_MATCH_TIME);
   }
 

src/test/java/com/github/tiennm99/lotterygenerator/TopMatchedNumberInCaseLotteryGeneratorTest.java

@@ -0,0 +1,31 @@
+package com.github.tiennm99.lotterygenerator;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+class TopMatchedNumberInCaseLotteryGeneratorTest {
+
+  @Test
+  void testMega645() {
+    var generator = new TopMatchedNumberInCaseLotteryGenerator();
+    var numbers = generator.generateNumbers(45, 6);
+    System.out.println(numbers);
+    assertEquals(6, numbers.size());
+    for (int number : numbers) {
+      assertTrue(number >= 1 && number <= 45);
+    }
+  }
+
+  @Test
+  void testMega655() {
+    var generator = new TopMatchedNumberInCaseLotteryGenerator();
+    var numbers = generator.generateNumbers(55, 6);
+    System.out.println(numbers);
+    assertEquals(6, numbers.size());
+    for (int number : numbers) {
+      assertTrue(number >= 1 && number <= 55);
+    }
+  }
+}

src/test/java/com/github/tiennm99/lotterygenerator/TopMatchedNumberLotteryGeneratorTest.java

@@ -5,11 +5,11 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.junit.jupiter.api.Test;
 
-class TopMatchedLotteryGeneratorTest {
+class TopMatchedNumberLotteryGeneratorTest {
 
   @Test
   void testMega645() {
-    var generator = new TopMatchedLotteryGenerator();
+    var generator = new TopMatchedNumberLotteryGenerator();
     var numbers = generator.generateNumbers(45, 6);
     System.out.println(numbers);
     assertEquals(6, numbers.size());
@@ -20,7 +20,7 @@ class TopMatchedLotteryGeneratorTest {
 
   @Test
   void testMega655() {
-    var generator = new TopMatchedLotteryGenerator();
+    var generator = new TopMatchedNumberLotteryGenerator();
     var numbers = generator.generateNumbers(55, 6);
     System.out.println(numbers);
     assertEquals(6, numbers.size());