2

Below is the structure am trying to build.

Its throwing Error:

Compile Error: unexpected token: 'class'

public class maincls {    
    public class test1 {
        public String teststr {get; set;}
        public test2 testDetails {get; set;}

        public class test2 {        
            public String firstName {get; set;}
            public String lastName{get; set;}
        }
    }
}

Did I miss anything here?

  • 6
    You can only have one inner class. An inner class cannot contain another inner class – Eric Apr 3 '17 at 20:31
6

You only have to read the first paragraph of the Apex Developer Guide documentation on Apex Class Definition to answer this question (emphasis mine):

Apex Class Definition

In Apex, you can define top-level classes (also called outer classes) as well as inner classes, that is, a class defined within another class. You can only have inner classes one level deep. For example:

public class myOuterClass {
   // Additional myOuterClass code here
   class myInnerClass {
     // myInnerClass code here
   }
}

So pull out test2 to nest it only one level deep:

public class TopLevel
{
    public class Inner1
    {
        public String someProperty { get; set; }
        public Inner2 otherProperty { get; set; }
    }
    public class Inner2
    {
        public String firstName { get; set; }
        public String lastName { get; set; }
    }
}
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