How to create interface in Salesforce?
Salesforce interface is java-like interface. You just create interface (kind of full-abstract class) and create methods for this class (they are abstract so they consist only name and kind of returning parameter).
What is an interface?
An interface is like a class in which none of the methods have been implemented—the method signatures are there, but the body of each method is empty. To use an interface, another class must implement it by providing a body for all of the methods contained in the interface.
What is a GUI in Salesforce?
When you work within a software program or within your Salesforce org, you use the graphic user interface (GUI). A GUI is an interface, comprising of screens, buttons, and a menu (or two). The GUI makes it easy for you to do basic tasks, such as navigation and database updates. You may be surprised to learn that you use a GUI every day!
What are the benefits of using interfaces in Java?
Benefit of using interfaces is that they provide us unification. When some class implements interface you can be sure that this class contains methods declared in interface. In other words no matter what this class do you can call method declared in interface and be sure that it will for example return type of value declared in interface
What is an interface used for?
You use an interface to define a protocol of behavior that can be implemented by any class anywhere in the class hierarchy. Interfaces are useful for the following: Capturing similarities among unrelated classes without artificially forcing a class relationship.
What is an example interface?
An interface is a description of the actions that an object can do… for example when you flip a light switch, the light goes on, you don’t care how, just that it does. In Object Oriented Programming, an Interface is a description of all functions that an object must have in order to be an “X”.
How many interfaces can a class implement apex?
However, one class can implement any number of interfaces, allowing a single class to have multiple behaviors.
What is abstraction in Salesforce?
Data abstraction is a mechanism of retrieving the essentials details without dealing with background details. In real world we have three levels of abstractions. They are physical level abstractions. They are physical level abstraction, conceptual/level abstraction and view level abstraction.
What are the 4 types of user interfaces?
Types of user interfaces graphical user interface (GUI) command line interface (CLI) menu-driven user interface. touch user interface.
What is called interface?
1a : the place at which independent and often unrelated systems meet and act on or communicate with each other the man-machine interface. b : the means by which interaction or communication is achieved at an interface. 2 : a surface forming a common boundary of two bodies, spaces, or phases an oil-water interface.
What is the apex interface?
Interface in Apex is a collection of unimplemented methods and it contains the method signature, but the body of each method is empty. To use Interface in Apex, another Apex class must implement it by providing the body for all the methods contained in Apex interfaces. Interface in Apex are given as global.
What is constructor in Salesforce?
A constructor is code that will be invoked when an object is created from the apex class that the constructor is associated with. Writing an apex constructor is optional and not required. If you do not have a constructor in your apex class, a default constructor is used, the default constructor does not have arguments.
What is abstract class in Salesforce?
Abstract class can contain methods signed as abstract, to clarify, it is a method that has only a signature (body is not defined). Child class must implement all methods declared as abstract! Abstract class can also include other methods, which have the logic.
What is interface vs abstract class?
Difference between abstract class and interfaceAbstract classInterface2) Abstract class doesn’t support multiple inheritance.Interface supports multiple inheritance.3) Abstract class can have final, non-final, static and non-static variables.Interface has only static and final variables.7 more rows
What is difference between interface and abstract class?
The key technical differences between an abstract class and an interface are: Abstract classes can have constants, members, method stubs (methods without a body) and defined methods, whereas interfaces can only have constants and methods stubs.
What is trace flag in Salesforce?
Trace flags filter the logs generated by the transaction. It contains debug level, start-end time, type of the log (ERROR, WARN, DEBUG), and the status of the job/transactions. Once you set the Trace Flag, the system will generate the debug log when a user performs the transaction.
What is a GUI in Salesforce?
When you work within a software program or within your Salesforce org, you use the graphic user interface (GUI). A GUI is an interface, comprising of screens, buttons, and a menu (or two). The GUI makes it easy for you to do basic tasks, such as navigation and database updates.
What is the command line interface?
With the command-line interface, you can do complex actions quickly. The command-line interface is also customizable with plug-ins and packages, which gives you the flexibility to customize your development workspace tools. With the command-line tool, you execute scripts, create directories, and interact with tools such as Git where you can build and work on source-driven development projects or CI integrations.
What is a GUI tool?
You may be surprised to learn that you use a GUI every day! The command-line tool is a text-based interface. Instead of buttons or multiple screens, you write commands in the command-line tool, which lets you interact with your computer or software program directly.
How to implement an interface?
To implement an interface, set the implements system attribute in the <aura:component> tag to the name of the interface that you are implementing . For example: A component can implement an interface and extend another component. An interface can extend multiple interfaces using a comma-separated list.
Why are interfaces more common than interfaces?
Since there are fewer restrictions on the content of abstract components, they are more common than interfaces. A component can implement multiple interfaces but can only extend one abstract component, so interfaces can be more useful for some design patterns.
What is an interface in markup?
Interfaces. Interfaces define a component’s shape by defining attributes, events, or methods that any implementing component contains. To use an interface, a component must implement it. An interface can’t be used directly in markup.
How to set the value of an attribute inherited from an interface?
To set the value of an attribute inherited from an interface, redefine the attribute in the sub component using <aura:attribute> and set the value in its default attribute. When you extend a component, you can use <aura:set> in a sub component to set the value of any attribute that’s inherited from the super component.
Can an interface extend another component?
A component can implement an interface and extend another component. <aura:component extends=”ns1:cmp1″ implements=”ns2:intf1″ >. An interface can extend multiple interfaces using a comma-separated list. <aura:interface extends=”ns:intf1,ns:int2″ >. Since there are fewer restrictions on the content of abstract components, …