[Difference Between Class.forName() and Class.forName().newInstance()] sample code (#13451)

core-java-modules/core-java/src/main/java/com/baeldung/loadclass/MyClassForLoad.java

@@ -0,0 +1,8 @@
+package com.baeldung.loadclass;
+
+
+public class MyClassForLoad {
+
+    private String data = "some data";
+
+}

core-java-modules/core-java/src/test/java/com/baeldung/loadclass/LoadClassUnitTest.java

@@ -0,0 +1,30 @@
+package com.baeldung.loadclass;
+
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.InvocationTargetException;
+
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+
+
+public class LoadClassUnitTest {
+
+    @Test
+    public void whenUseClassForName_createdInstanceOfClassClass() throws ClassNotFoundException {
+        Class instance = Class.forName("com.baeldung.loadclass.MyClassForLoad");
+        assertInstanceOf(Class.class, instance, "instance should be of Class.class");
+    }
+
+    @Test
+    public void whenUseClassForNameWithNewInstance_createdInstanceOfTargetClas() throws ClassNotFoundException, InstantiationException, IllegalAccessException {
+        Object instance = Class.forName("com.baeldung.loadclass.MyClassForLoad").newInstance();
+        assertInstanceOf(MyClassForLoad.class, instance, "instance should be of MyClassForLoad class");
+    }
+
+    @Test
+    public void whenUseClassForNameWithDeclaredConstructor_newInstanceCreatedInstanceOfTargetClas() throws ClassNotFoundException, InstantiationException, IllegalAccessException, NoSuchMethodException, InvocationTargetException {
+        Object instance = Class.forName("com.baeldung.loadclass.MyClassForLoad").getDeclaredConstructor().newInstance();
+        assertInstanceOf(MyClassForLoad.class, instance, "instance should be of MyClassForLoad class");
+    }
+
+}