BAEL-9384 Flexible constructor bodies in java

Author: sam-gardner

core-java-modules/core-java-25/pom.xml

@@ -0,0 +1,28 @@
+<?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-25</artifactId>
+
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>25</source>
+                    <target>25</target>
+                    <compilerArgs>--enable-preview</compilerArgs>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

core-java-modules/core-java-25/src/main/java/com/baeldung/flexibleconstructorbodies/Coffee.java

@@ -0,0 +1,17 @@
+package com.baeldung.flexibleconstructorbodies;
+
+public class Coffee {
+
+    int water;
+    int milk;
+
+    public Coffee(int water, int milk) {
+        this.water = water;
+        this.milk = milk;
+    }
+
+    public int getTotalVolume() {
+        return water + milk;
+    }
+
+}

core-java-modules/core-java-25/src/main/java/com/baeldung/flexibleconstructorbodies/SmallCoffee.java

@@ -0,0 +1,17 @@
+package com.baeldung.flexibleconstructorbodies;
+
+public class SmallCoffee extends Coffee {
+
+    String topping;
+
+    public SmallCoffee(int water, int milk, String topping) {
+        int maxCupVolume = 100;
+        int totalVolume = water + milk;
+        if(totalVolume > maxCupVolume) {
+            throw new IllegalArgumentException();
+        }
+        this.topping = topping;
+        super(water, milk);
+    }
+
+}

core-java-modules/core-java-25/src/test/java/FlexibleConstructorBodiesTest.java

@@ -0,0 +1,15 @@
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.Test;
+
+import com.baeldung.flexibleconstructorbodies.SmallCoffee;
+
+public class FlexibleConstructorBodiesTest {
+
+    @Test
+    public void test() {
+        SmallCoffee smallCoffee = new SmallCoffee(30,40, "none");
+        assertEquals(70, smallCoffee.getTotalVolume());
+    }
+
+}