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Java 8 introduces a new concept of default method implementation in interfaces. This capability is added for backward compatibility so that old interfaces can be used to leverage the lambda expression capability of Java 8. For example, ‘List’ or ‘Collection’ interfaces do not have ‘foreach’ method declaration. Thus, adding such method will simply break the collection framework implementations. Java 8 introduces default method so that List/Collection interface can have a default implementation of foreach method, and the class implementing these interfaces need not implement the same. Syntax public interface vehicle { default void print() { ... Read More
As per my understanding, it is not feasible. You can access local class dynamically but statically referring to it in another class seems impossible. You might think about calling methods as dynamic in this case.
Constructors are similar to methods but, They do not have any return type. The name of the constructor is same as the name of the class. Every class has a constructor. If we do not explicitly write a constructor for a class, the Java compiler builds a default constructor for that class. Each time a new object is created, at least one constructor will be invoked. A class can have more than one constructor. this() and super() are used to call constructors explicitly. Where, using this() you can call the current class’s constructor and using super() you can ... Read More
The best possible solution to avoid this issue is by adding breakpoints to the best places. This issue is common with VBA and C# while debugging code includes COM libraries.
The full form of API is Application Programming Interface. It is a document which gives you the list of all the packages, classes, and interfaces, along with their fields and methods.Using these API’s, the programmer can know how to use the methods, fields, classes, interfaces provided by Java libraries.
No, you cannot have both this() and super() in a single constructor.
SAP System Authorization Concept deals with protecting the SAP system from running transactions and programs from unauthorized access. You shouldn’t allow users to execute transactions and programs in SAP system until they have defined authorization for this activity.To make your system more secure and to implement strong authorization, you need to review your authorization plan to make sure that it meets the security requirement of the company and there are no security violations.The Transaction Code: SU01 is used for user creation in a SAP system. In the following screen, you can see different User types in a SAP system under ... Read More
“TYPE STANDARD TABLE OF “refers to the standard table. It refers to a normal internal table which can be accessed via table index or by key in case if you have a key defined over a table while sorting.“TYPE HASHED TABLE OF” refers to the generic hashed internal table. The table is created and data is stored using the hashing algorithm. The main advantage of the hashing algorithm is that accessing any part of the table is independent of the size of the table and hence an increase in the size of the table does not result in any delay ... Read More
This port is used to provide a range of connections to SAP gateway for RFC connection. If you are getting this error, try to resolve your server name with “nslookup” or try connecting to IP address instead of server name.
The Object class of the java.lang package is the root class in Java i.e. It is the super class of every user-defined/predefined class n Java. All objects, including arrays, implement the methods of this class. The reason for this is to have common functionalities such as synchronization, garbage collection, collection support, object cloning for all objects in Java. The class named Class of java.lang package provides a method named getSuperclass() this method returns the Class representing the superclass of the current Class. So, Create a sample concrete class and try to get the name of its super class using this ... Read More