Add eagerly singleton

dynamicy · dynamicy · commit 44b6b0f42fc1 · 2014-11-12T18:10:58.000+08:00
diff --git a/SingletonPattern/Java/EagerlySingleton.java b/SingletonPattern/Java/EagerlySingleton.java
@@ -0,0 +1,26 @@
+public class EagerlySingleton
+{
+    // Use static initiallizer, that will make instace created fast.
+    private static EagerlySingleton instance = new EagerlySingleton();
+
+    private EagerlySingleton()
+    {
+    }
+
+    // Just get the instance
+    public static EagerlySingleton getInstance()
+    {
+        return instance;
+    }
+
+    public static void main(String[] args)
+    {
+        EagerlySingleton singletonInstance1 = EagerlySingleton.getInstance();
+        EagerlySingleton singletonInstance2 = EagerlySingleton.getInstance();
+
+        if(singletonInstance1 == singletonInstance2)
+        {
+            System.out.println("They're the same instance");
+        }
+    }
+}
