Singleton helper class for lazily initialization

371718330@qq.com · 371718330@qq.com · commit 792d23b6e8d7 · 2017-07-19T14:52:46.000+08:00
diff --git a/CommonUtil/src/main/java/com/jingewenku/abrahamcaijin/commonutil/SingletonUtils.java b/CommonUtil/src/main/java/com/jingewenku/abrahamcaijin/commonutil/SingletonUtils.java
@@ -0,0 +1,30 @@
+package com.jingewenku.abrahamcaijin.commonutil;
+
+/**
+ * @Description:主要功能:Singleton helper class for lazily initialization
+ * @Prject: CommonUtilLibrary
+ * @Package: com.jingewenku.abrahamcaijin.commonutil
+ * @author: AbrahamCaiJin
+ * @date: 2017年05月24日 18:17
+ * @Copyright: 个人版权所有
+ * @Company:
+ * @version: 1.0.0
+ */
+
+public abstract class SingletonUtils<T> {
+
+    private T instance;
+
+    protected abstract T newInstance();
+
+    public final T getInstance() {
+        if (instance == null) {
+            synchronized (SingletonUtils.class) {
+                if (instance == null) {
+                    instance = newInstance();
+                }
+            }
+        }
+        return instance;
+    }
+}
