Constructor & Conditional Statements in Salesforce

Table of Contents

Previous Sessions

If you missed the previous sessions, please use the below links for the previous sessions

• https://www.pantherschools.com/methods-in-salesforce-in-hindi/
• https://www.pantherschools.com/introduction-to-oops-using-salesforce
• https://www.pantherschools.com/data-types-class-access-modifiers-in-salesforce

Constructor in Salesforce

A constructor is a unique method that is used to create and initialize an instance/Object of a class. When an object is created from a class, the constructor is automatically called to initialize the object’s state and properties.

• The constructor does not have any return type.
• The name of the constructor must be the same as the Class Name.
• The parent class(topmost class) constructor should always be public.
  • Private in cases where the methods are class methods.

Types of Constructor

There are two types of constructors in Salesforce:

• Default Constructor: A default constructor is a constructor that is automatically created by Salesforce if no other constructor is defined in the class.
  • The default constructor takes no arguments and does not perform any initialization.
• A parameterized constructor is a constructor that takes one or more parameters and uses them to initialize the object’s state and properties.
  • When you want to enforce that user must need to pass the value while creating the instance/Object.
  • Parameterized constructors are useful for setting initial values or default values for object properties.
    • Animal dog = new Animal(‘Paremrian’);

Conditional Statements

• Conditional Statements
  • If else
  • Switch

Use the “if-else” statement in Apex code to execute different blocks of code based on a condition

Switch Statement in Salesforce

You can use the “switch” statement in Apex code to execute different blocks of code based on the value of a variable.
The syntax for the “switch” statement is as follows:

Here’s an example of how to use the “switch” statement in Apex code:

Hands-on Code

Assignment

Create a class “Car” that should have the following

• The class should have the private variables
  • Name
  • Model
  • Year
  • Company
  • Type
• Create multiple constructors that are accepting the different parameters
  • Car(String name, String type)
  • Car(String name)
  • Car( )
  • Car(String name, String model, String year, String company, Type)
  • Car(Integer year)
• Within the constructors assign the values to the private variables. Note: – The value should be assigned to the variable that is passed in the constructor and for other variables assign a blank value. See the example below
  • public Car(String year){
    this.year = year;
    this.name = ”;
    this.model = ”;
    this.company = ”;
    this.type = ”;
    }
• Create various methods to print the Car Details
  • printCarInformation( ) → This method should print all the information about the Car
  • printCarName( ) → This method should only print the name of the Car
  • printCarYear( ) → This method should only print the built year of the Car
  • printCarNameType( ) → This method should only print the name & type of the Car

Full Video

Resources

• https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_classes_constructors.htm
• https://www.tutorialkart.com/learn_apex/constructor-in-apex-programming/
• https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/langCon_apex_if_else.htm
• https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/langCon_apex_switch.htm
• https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/langCon_apex_expressions_operators_understanding.htm
• https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/langCon_apex_SafeNavigationOperator.htm
• Math Class – https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_methods_system_math.htm
• String Class – https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_methods_system_string.htm