Main Code:
public class NewConstEx {
public list<string> subjects;
public NewConstEx(list<string> subjectlist){
subjects=subjectlist;
}
}
anonymous Window:
list<string> mysubject = new list<string>{
'Apex',
'LWC',
'JS',
'Java'
};
NewConstEx N = new NewConstEx(mysubject);
system.debug(N.subjects);
#Apex #Salesforce Developer
Hi Hitesh - yes, you can define the list inside the class instead of passing it from anonymous apex. A couple of ways:
1) A no-argument constructor that builds the list itself:
public class NewConstEx {
public List<String> subjects;
public NewConstEx() {
subjects = new List<String>{'Apex','LWC','JS','Java'};
}
}
// Anonymous:
NewConstEx n = new NewConstEx();
System.debug(n.subjects);
2) Or initialize the field right at declaration (no constructor needed for that):
public List<String> subjects = new List<String>{'Apex','LWC','JS','Java'};
When to use which:
- Parameterized constructor (your current version) = the CALLER supplies the data. Best when different callers pass different lists, so it is more reusable.
- No-arg constructor or field initializer = the CLASS owns the data. Best when the list is fixed/internal.
And you do not have to choose - Apex supports constructor overloading, so you can keep BOTH a no-arg and a List<String> constructor in the same class and call whichever fits.
If this helps, please mark it as the Best Answer so it helps the next person - thanks :)
