3
Map Initialization Methods in APEX
Chapter Topics
- Apex Data Types
- Integer Data Type in APEX
- Floating Point Data Type in APEX
- String Data Type in APEX
- Date Datatypes in APEX
- Time and DateTime Data Types in APEX
- Boolean Datatype in Salesforce
- ID & Blob Datatypes in APEX
- What is the Rule of Conversions in Apex?
- Enums in APEX
- sObjects in Salesforce
- Generic sObjects in Salesforce
- Collections in APEX
- Lists in APEX
- List Array Notation in APEX
- Lists Initialization in APEX
- Nested Lists in APEX
- Sets in APEX
- Sets Initialization And Methods
- Maps in APEX
- Map Initialization Methods in APEX
- Operators in Apex and Their Types
- Shorthand Operator
- Equality Operator
- Relational Operators(<,>,<=,>=)
Initialisation of Maps in Apex
In Salesforce Apex, Maps are collections of key-value pairs, where each unique key maps to a single value. Initializing of Maps in Apex can be done in various ways depending on the requirements. Below are the different methods to initialize maps in Apex.
Empty Map Initialization
- Initialize an Empty Map of String to Integer:
- Initialize an Empty Map of ID to Custom Object:
Map Initialization with Values
- Initialize a Map with String Keys and Integer Values:
- Initialize a Map with String Keys and Custom Object Values:
Map Initialization with SOQL Query
Initialize a Map from a SOQL Query:
Map Methods in Apex
Following are the Map methods in Apex:
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