diff --git a/core-java-modules/core-java-string-operations-7/pom.xml b/core-java-modules/core-java-string-operations-7/pom.xml
index 595f918fcd..a2c7036e34 100644
--- a/core-java-modules/core-java-string-operations-7/pom.xml
+++ b/core-java-modules/core-java-string-operations-7/pom.xml
@@ -1,72 +1,72 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-    <artifactId>core-java-string-operations-7</artifactId>
-    <name>core-java-string-operations-7</name>
-    <packaging>jar</packaging>
-
-    <parent>
-        <groupId>com.baeldung.core-java-modules</groupId>
-        <artifactId>core-java-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
-    </parent>
-
-    <dependencies>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-lang3</artifactId>
-            <version>${apache.commons.lang3.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-text</artifactId>
-            <version>${commons-text.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.liquibase</groupId>
-            <artifactId>liquibase-core</artifactId>
-            <version>4.9.1</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter</artifactId>
-            <version>5.8.1</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.liquibase</groupId>
-            <artifactId>liquibase-core</artifactId>
-            <version>4.9.1</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>4.13.2</version>
-        </dependency>
-    </dependencies>
-
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>${maven.compiler.source}</source>
-                    <target>${maven.compiler.target}</target>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
-
-    <properties>
-        <maven.compiler.source>11</maven.compiler.source>
-        <maven.compiler.target>11</maven.compiler.target>
-        <apache.commons.lang3.version>3.12.0</apache.commons.lang3.version>
-        <commons-text.version>1.10.0</commons-text.version>
-    </properties>
-
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-string-operations-7</artifactId>
+    <name>core-java-string-operations-7</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${apache.commons.lang3.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-text</artifactId>
+            <version>${commons-text.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.liquibase</groupId>
+            <artifactId>liquibase-core</artifactId>
+            <version>4.9.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.liquibase</groupId>
+            <artifactId>liquibase-core</artifactId>
+            <version>4.9.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13.2</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+        <apache.commons.lang3.version>3.13.0</apache.commons.lang3.version>
+        <commons-text.version>1.10.0</commons-text.version>
+    </properties>
+
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-string-operations-7/src/main/java/com/baeldung/strcontainsnumber/StrContainsNumberUtils.java b/core-java-modules/core-java-string-operations-7/src/main/java/com/baeldung/strcontainsnumber/StrContainsNumberUtils.java
new file mode 100644
index 0000000000..a609b94cb8
--- /dev/null
+++ b/core-java-modules/core-java-string-operations-7/src/main/java/com/baeldung/strcontainsnumber/StrContainsNumberUtils.java
@@ -0,0 +1,77 @@
+package com.baeldung.strcontainsnumber;
+
+import java.util.regex.Pattern;
+
+import org.apache.commons.lang3.StringUtils;
+
+import com.google.common.base.CharMatcher;
+
+public class StrContainsNumberUtils {
+
+    static boolean checkUsingMatchesMethod(String input) {
+        if (input == null || input.isEmpty()) {
+            return false;
+        }
+
+        return input.matches(".*\\d.*");
+    }
+
+    static boolean checkUsingPatternClass(String input) {
+        if (input == null || input.isEmpty()) {
+            return false;
+        }
+
+        return Pattern.compile(".*\\d.*")
+          .matcher(input)
+          .matches();
+    }
+
+    static boolean checkUsingReplaceAllMethod(String input) {
+        if (input == null || input.isEmpty()) {
+            return false;
+        }
+
+        String result = input.replaceAll("\\d", "");
+        return result.length() != input.length();
+    }
+
+    static boolean checkUsingIsDigitMethod(String input) {
+        if (input == null || input.isEmpty()) {
+            return false;
+        }
+
+        for (char c : input.toCharArray()) {
+            if (Character.isDigit(c)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    static boolean checkUsingStreamApi(String input) {
+        if (input == null || input.isEmpty()) {
+            return false;
+        }
+
+        return input.chars()
+          .anyMatch(Character::isDigit);
+    }
+
+    static boolean checkUsingApacheCommonsLang(String input) {
+        String result = StringUtils.getDigits(input);
+        return result != null && !result.isEmpty();
+    }
+
+    static boolean checkUsingGuava(String input) {
+        if (input == null || input.isEmpty()) {
+            return false;
+        }
+
+        String result = CharMatcher.forPredicate(Character::isDigit)
+          .retainFrom(input);
+
+        return !result.isEmpty();
+    }
+
+}
diff --git a/core-java-modules/core-java-string-operations-7/src/test/java/com/baeldung/strcontainsnumber/StrContainsNumberUtilsUnitTest.java b/core-java-modules/core-java-string-operations-7/src/test/java/com/baeldung/strcontainsnumber/StrContainsNumberUtilsUnitTest.java
new file mode 100644
index 0000000000..9a60a827e0
--- /dev/null
+++ b/core-java-modules/core-java-string-operations-7/src/test/java/com/baeldung/strcontainsnumber/StrContainsNumberUtilsUnitTest.java
@@ -0,0 +1,69 @@
+package com.baeldung.strcontainsnumber;
+
+import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
+import org.junit.Test;
+
+public class StrContainsNumberUtilsUnitTest {
+
+    private static final String INPUT_WITH_NUMBERS = "We hope 2024 will be great";
+    private static final String INPUT_WITHOUT_NUMBERS = "Hello world";
+
+    @Test
+    public void givenInputString_whenUsingMatchesMethod_ThenCheck() {
+        assertTrue(StrContainsNumberUtils.checkUsingMatchesMethod(INPUT_WITH_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingMatchesMethod(INPUT_WITHOUT_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingMatchesMethod(""));
+        assertFalse(StrContainsNumberUtils.checkUsingMatchesMethod(null));
+    }
+
+    @Test
+    public void givenInputString_whenUsingPatternClass_ThenCheck() {
+        assertTrue(StrContainsNumberUtils.checkUsingPatternClass(INPUT_WITH_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingPatternClass(INPUT_WITHOUT_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingPatternClass(""));
+        assertFalse(StrContainsNumberUtils.checkUsingPatternClass(null));
+    }
+
+    @Test
+    public void givenInputString_whenUsingReplaceAllMethod_ThenCheck() {
+        assertTrue(StrContainsNumberUtils.checkUsingReplaceAllMethod(INPUT_WITH_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingReplaceAllMethod(INPUT_WITHOUT_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingReplaceAllMethod(""));
+        assertFalse(StrContainsNumberUtils.checkUsingReplaceAllMethod(null));
+    }
+
+    @Test
+    public void givenInputString_whenUsingIsDigitMethod_ThenCheck() {
+        assertTrue(StrContainsNumberUtils.checkUsingIsDigitMethod(INPUT_WITH_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingIsDigitMethod(INPUT_WITHOUT_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingIsDigitMethod(""));
+        assertFalse(StrContainsNumberUtils.checkUsingIsDigitMethod(null));
+    }
+
+    @Test
+    public void givenInputString_whenUsingStreamApi_ThenCheck() {
+        assertTrue(StrContainsNumberUtils.checkUsingStreamApi(INPUT_WITH_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingStreamApi(INPUT_WITHOUT_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingStreamApi(""));
+        assertFalse(StrContainsNumberUtils.checkUsingStreamApi(null));
+    }
+
+    @Test
+    public void givenInputString_whenUsingApacheCommonsLang_ThenCheck() {
+        assertTrue(StrContainsNumberUtils.checkUsingApacheCommonsLang(INPUT_WITH_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingApacheCommonsLang(INPUT_WITHOUT_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingApacheCommonsLang(""));
+        assertFalse(StrContainsNumberUtils.checkUsingApacheCommonsLang(null));
+    }
+
+    @Test
+    public void givenInputString_whenUsingGuava_ThenCheck() {
+        assertTrue(StrContainsNumberUtils.checkUsingGuava(INPUT_WITH_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingGuava(INPUT_WITHOUT_NUMBERS));
+        assertFalse(StrContainsNumberUtils.checkUsingGuava(""));
+        assertFalse(StrContainsNumberUtils.checkUsingGuava(null));
+    }
+
+}