alcuni test su synchronized e singleton

threads_test/test_2_singleton.java

@@ -0,0 +1,39 @@
+package threads_test;
+
+/**
+ * Created by Giovanni on 12/10/2014.
+ */
+public class test_2_singleton {
+
+    private test_2_singleton(){
+
+        a="initialized";
+
+    }
+
+    private String a;
+
+
+
+
+    //////////////////////////////////////////////////////////////
+
+    private static class inner_test_2_singleton {
+
+
+        private static final test_2_singleton x = new test_2_singleton() ;
+
+    }
+
+
+
+
+    public static test_2_singleton get_instance(){
+
+        return inner_test_2_singleton.x;
+    }
+
+
+
+
+}