How to Use Wrapper Classes in Apex to Access Members Using Dot No

In Apex, the wrapper class is used to hold different types of data together as a single unit. If a wrapper class contains a list, object, or inner classes, you can access their members using dot notation.

Let's consider an example where you have a wrapper class called MyWrapperClass, which contains a list, an object, and an inner class:

public class MyWrapperClass {

    public List<String> stringList;

    public MyCustomObject customObject;

    public InnerClass inner;

    public class MyCustomObject {

        public String name;

        public Integer value;

    }

    public class InnerClass {

        public String innerField;

    }

}

To access the members of the wrapper class, you would follow these steps:

1. Create an instance of the MyWrapperClass:

MyWrapperClass wrapper = new MyWrapperClass();

2. Access the members of the wrapper class using dot notation:

// Accessing the list member

List<String> myList = wrapper.stringList;

// Accessing the custom object member

MyWrapperClass.MyCustomObject obj = wrapper.customObject;

String name = obj.name;

Integer value = obj.value;

// Accessing the inner class member

MyWrapperClass.InnerClass inner = wrapper.inner;

String innerField = inner.innerField;

By using the dot notation, you can access the members of the list, object, and inner class contained within the wrapper class.

Note: Make sure to initialize the wrapper class and its members before accessing them.