Add LazyEvaluate class

core-java-modules/core-java-lang-6/src/main/java/com/baeldung/returnfirstnonnull/LazyEvaluate.java

@@ -0,0 +1,16 @@
+package com.baeldung.returnfirstnonnull;
+
+class LazyEvaluate {
+
+    String methodA() {
+        return null;
+    }
+
+    String methodB() {
+        return "first non null";
+    }
+
+    String methodC() {
+        return "second non null";
+    }
+}