Merge pull request #3392 from sirishrenukumar/srenukumar/static_class

Static class example (review comments addressed)

core-java/src/main/java/com/baeldung/staticclass/Pizza.java

@@ -0,0 +1,33 @@
+package com.baeldung.staticclass;
+
+public class Pizza {
+
+    private static String cookedCount;
+    private boolean isThinCrust;
+
+    // Accessible globally
+    public static class PizzaSalesCounter {
+
+        private static String orderedCount;
+        public static String deliveredCount;
+
+        PizzaSalesCounter() {
+            System.out.println("Static field of enclosing class is "
+              + Pizza.cookedCount);
+            System.out.println("Non-static field of enclosing class is "
+              + new Pizza().isThinCrust);
+        }
+    }
+
+    Pizza() {
+        System.out.println("Non private static field of static class is "
+          + PizzaSalesCounter.deliveredCount);
+        System.out.println("Private static field of static class is "
+          + PizzaSalesCounter.orderedCount);
+    }
+
+    public static void main(String[] a) {
+        // Create instance of the static class without an instance of enclosing class
+        new Pizza.PizzaSalesCounter();
+    }
+}