Can you instantiate a static class

Serialization of inner classes, including local and anonymous classes, is strongly discouraged. When the Java compiler compiles certain constructs, such as inner classes, it creates synthetic constructs ; these are classes, methods, fields, and other constructs that do not have a corresponding construct in the source code.

Synthetic constructs enable Java compilers to implement new Java language features without changes to the JVM. However, synthetic constructs can vary among different Java compiler implementations, which means that.

Consequently, you may have compatibility issues if you serialize an inner class and then deserialize it with a different JRE implementation.

See the section Implicit and Synthetic Parameters in the section Obtaining Names of Method Parameters for more information about the synthetic constructs generated when an inner class is compiled.

All rights reserved. Hide TOC. Classes and Objects. Passing Information to a Method or a Constructor. Summary of Creating and Using Classes and Objects. Terminology: Nested classes are divided into two categories: non-static and static. Non-static nested classes are called inner classes. In C , static means something which cannot be instantiated. You cannot create an object of a static class and cannot access static members using an object.

C classes, variables, methods, properties, operators, events, and constructors can be defined as static using the static modifier keyword. Apply the static modifier before the class name and after the access modifier to make a class static. The following defines a static class with static fields and methods. You cannot create an object of the static class; therefore the members of the static class can be accessed directly using a class name like ClassName.

MemberName , as shown below. The normal class non-static class can contain one or more static methods, fields, properties, events and other non-static members. It is more practical to define a non-static class with some static members, than to declare an entire class as static.

Static fields of a non-static class is shared across all the instances. So, changes done by one instance would reflect in others. You can define one or more static methods in a non-static class. Posted 3-Sep pm Aadhar Joshi. Aadhar Joshi Sep am. Ganesh Nikam Sep am. Member Jul am. Add a static class to some new solution: C. Posted 3-Sep pm BillWoodruff.

Hey See below link: It will helpful for you. Why Staic Class? Posted 3-Sep pm prashant patil Posted 3-Sep pm Swinkaran. Posted Sep pm Basnta Padhi. When very first time you call any of the method from your static class, at that time it's Instance will be created. So if you have Static class in your application it's instance will not be created until it's Method call.

If you call two method of your Static class Instance will be created for only first method call and for second method call the lastly created instance will be used. Hope you got the idea Best luck Thanks -Amit Gajjar. Posted 3-Sep pm AmitGajjar. You cannot, at any time write new MyStaticClass without the compiler complaining. It never has a this reference, and the fields, properties and methods can only ever be accessed via the class name: MyStaticClass.

MyMethod In addition, you cannot derive from a static class, not can a static class derive from any class other than object. Posted Jun pm Muneer Shiekh. Add your solution here. OK Paste as. Treat my content as plain text, not as HTML. Existing Members Sign in to your account. This email is in use. So what is the difference in use between a static method and the non-static methods that we've seen so far?

A static method can be used when the storage in an object is not needed. For example, consider the method cos x from the class Math. If we want to write a method that returns the cosine of some value that we pass as a parameter, we have no need for an object: all we have to do is to declare the method to take a parameter, and return a value.

Indeed, the API tells us that the declaration for cos is: public static double cos double a So when a method doesn't need to access any stored values, a static method is appropriate. Another situation in which a static method is appropriate is when a method only accesses static variables.