BAEL-5351: Added empty map initialization methods in Java

core-java-modules/core-java-collections-maps-2/src/main/java/com/baeldung/map/initialize/EmptyMapInitializer.java

@@ -0,0 +1,49 @@
+package com.baeldung.map.initialize;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.NavigableMap;
+import java.util.TreeMap;
+
+public class EmptyMapInitializer {
+
+  public static Map<String, String> articleMap;
+  static {
+    articleMap = new HashMap<>();
+  }
+
+  public static Map<String, String> createEmptyMap() {
+    return Collections.emptyMap();
+  }
+
+  public void createMapUsingConstructors() {
+    Map hashMap = new HashMap();
+    Map linkedHashMap = new LinkedHashMap();
+    Map treeMap = new TreeMap();
+  }
+
+  public Map<String, String> createEmptyMapUsingMapsObject() {
+    Map<String, String> emptyMap = Maps.newHashMap();
+    return emptyMap;
+  }
+
+  public Map createGenericEmptyMapUsingMapsObject() {
+    return Maps.<String, Integer>newHashMap();
+  }
+
+  public static Map<String, String> createMapUsingGuava() {
+    Map<String, String> emptyMapUsingGuava =
+        Maps.newHashMap(ImmutableMap.of());
+    return emptyMapUsingGuava;
+  }
+
+  public NavigableMap<String, String> createEmptyNavigableMap() {
+    NavigableMap<String, String> navigableMap = Collections.emptyNavigableMap();
+    return navigableMap;
+  }
+
+}