[BAEL-8493] by sgrverma23 - Changes for conversation of currency code to symbol in java (#18427)

* BAEL-8493:sgrverma23 - Changes for coversation of currency code to symbol in java

* fixing release version

* refactoring test methods and version number

* moving to currency package from default

Author: sgrverma23

core-java-modules/core-java-currency/README.md

@@ -0,0 +1 @@
+#core-java-currency

core-java-modules/core-java-currency/pom.xml

@@ -0,0 +1,43 @@
+<?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-currency</artifactId>
+    <packaging>jar</packaging>
+    <name>core-java-currency</name>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>${maven-surefire-plugin.version}</version>
+                <configuration>
+                    <argLine>--enable-preview</argLine>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <maven.compiler.source.version>17</maven.compiler.source.version>
+        <maven.compiler.target.version>17</maven.compiler.target.version>
+        <lombok.version>1.18.24</lombok.version>
+    </properties>
+
+</project>

core-java-modules/core-java-currency/src/main/java/com/baeldung/currency/utils/CurrencyLocaleUtil.java

@@ -0,0 +1,11 @@
+package com.baeldung.currency.utils;
+
+import java.util.Currency;
+import java.util.Locale;
+
+public class CurrencyLocaleUtil {
+    public String getSymbolForLocale(Locale locale) {
+        Currency currency = Currency.getInstance(locale);
+        return currency.getSymbol();
+    }
+}

core-java-modules/core-java-currency/src/main/java/com/baeldung/currency/utils/CurrencyMapUtil.java

@@ -0,0 +1,15 @@
+package com.baeldung.currency.utils;
+
+import java.util.Map;
+
+public class CurrencyMapUtil {
+    private static final Map<String, String> currencymap = Map.of(
+            "USD", "$",
+            "EUR", "€",
+            "INR", "₹"
+    );
+
+    public static String getSymbol(String currencyCode) {
+        return currencymap.getOrDefault(currencyCode, "Unknown");
+    }
+}

core-java-modules/core-java-currency/src/main/java/com/baeldung/currency/utils/CurrencyUtil.java

@@ -0,0 +1,10 @@
+package com.baeldung.currency.utils;
+
+import java.util.Currency;
+
+public class CurrencyUtil {
+    public static String getSymbol(String currencyCode) {
+        Currency currency = Currency.getInstance(currencyCode);
+        return currency.getSymbol();
+    }
+}

core-java-modules/core-java-currency/src/test/java/com/baeldung/currency/utils/CurrencyLocaleUtilTest.java

@@ -0,0 +1,15 @@
+package com.baeldung.currency.utils;
+
+import org.junit.jupiter.api.Test;
+import java.util.Locale;
+import static org.junit.jupiter.api.Assertions.*;
+
+class CurrencyLocaleUtilTest {
+    private final CurrencyLocaleUtil currencyLocale = new CurrencyLocaleUtil();
+
+    @Test
+    void givenLocale_whenGetSymbolForLocale_thenReturnsLocalizedSymbol() {
+        assertEquals("$", currencyLocale.getSymbolForLocale(Locale.US));
+        assertEquals("€", currencyLocale.getSymbolForLocale(Locale.FRANCE));
+    }
+}

core-java-modules/core-java-currency/src/test/java/com/baeldung/currency/utils/CurrencyMapUtilTest.java

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+package com.baeldung.currency.utils;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+class CurrencyMapUtilTest {
+    @Test
+    void givenValidCurrencyCode_whenGetSymbol_thenReturnsCorrectSymbol() {
+        assertEquals("$", CurrencyMapUtil.getSymbol("USD"));
+        assertEquals("€", CurrencyMapUtil.getSymbol("EUR"));
+        assertEquals("₹", CurrencyMapUtil.getSymbol("INR"));
+    }
+
+    @Test
+    void givenInvalidCurrencyCode_whenGetSymbol_thenReturnsUnknown() {
+        assertEquals("Unknown", CurrencyMapUtil.getSymbol("XYZ"));
+    }
+}

core-java-modules/core-java-currency/src/test/java/com/baeldung/currency/utils/CurrencyUtilTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.currency.utils;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+class CurrencyUtilTest {
+    @Test
+    void givenValidCurrencyCode_whenGetSymbol_thenReturnsCorrectSymbol() {
+        assertEquals("$", CurrencyUtil.getSymbol("USD"));
+        assertEquals("€", CurrencyUtil.getSymbol("EUR"));
+    }
+
+    @Test
+    void givenInvalidCurrencyCode_whenGetSymbol_thenThrowsException() {
+        assertThrows(IllegalArgumentException.class, () -> CurrencyUtil.getSymbol("INVALID"));
+    }
+}

core-java-modules/pom.xml

@@ -124,6 +124,7 @@
         <module>core-java-concurrency-collections</module>
         <module>core-java-concurrency-collections-2</module>
         <module>core-java-console</module>
+        <module>core-java-currency</module>
         <module>core-java-datetime-string-2</module>
         <module>core-java-date-operations</module>
         <module>core-java-date-operations-2</module>