JAVA-11241 Added missing pom.xml for container modules and other cleanup

core-java-modules/core-java-regex-2/src/main/java/com/baeldung/regex/array/RegexMatches.java

@@ -0,0 +1,24 @@
+package com.baeldung.regex.array;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.*;
+	
+class RegexMatches {
+	
+    String[] regexMatch(String strSearch)
+	{
+	    List<String> matchesList = new ArrayList<String>();
+	    String stringToSearch = strSearch;
+	    Pattern p1 = Pattern.compile("780{1}\\d{7}");
+	    Matcher m1 = p1.matcher(stringToSearch);
+	    while (m1.find()) 
+	    {
+	    	matchesList.add(m1.group());
+	    }
+	    int sizeOfNewArray = matchesList.size();
+	    String newArrayOfMatches[] = new String[sizeOfNewArray];
+	    matchesList.toArray(newArrayOfMatches);
+	    return newArrayOfMatches;
+	}
+}

core-java-modules/core-java-regex-2/src/test/java/com/baeldung/regex/array/RegexMatchesUnitTest.java

@@ -0,0 +1,32 @@
+package com.baeldung.regex.array;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+
+import org.junit.jupiter.api.Test;
+
+class RegexMatchesUnitTest {
+
+	@Test
+	void whenFourNums_thenFourMatches() {
+		RegexMatches rm = new RegexMatches();
+		String actual[] = rm.regexMatch("7801111211fsdafasdfa  7802222222  sadfsadfsda7803333333 sadfdasfasd 7804444444");
+		
+		assertArrayEquals(new String[] {"7801111211", "7802222222", "7803333333", "7804444444"}, actual, "success");
+	}
+
+	@Test
+	void whenThreeNums_thenThreeMatches() {
+		RegexMatches rm = new RegexMatches();
+		String actual[] = rm.regexMatch("7801111211fsdafasdfa  780222222  sadfsadfsda7803333333 sadfdasfasd 7804444444");
+		
+		assertArrayEquals(new String[] {"7801111211", "7803333333", "7804444444"}, actual, "success");
+	}
+
+	@Test
+	void whenZeroNums_thenZeroMatches() {
+		RegexMatches rm = new RegexMatches();
+		String actual[] = rm.regexMatch("78011111fsdafasdfa  780222222  sadfsadfsda78033333 sadfdasfasd 7804444");
+		
+		assertArrayEquals(new String[] {}, actual, "success");
+	}
+}