Introduction
When working with sets in apex sometimes we need to create a string from the set’s values but there is no function that can convert a set into a string as we have for lists. To convert set into a string we can use these two approaches
1. Using Loop
In this approach, we loop over the set’s data and put it into a string.
Set<String> setdata = new Set<String>{‘T1’, ‘T2’, ‘T3’, ‘T4’};
String setStringLoop = ”;
for(String eachElement : setdata){
setStringLoop += eachElement + ‘,’;
}
setStringLoop = setStringLoop.substring(0,setStringLoop.length()-1);
system.debug(setStringLoop);
2. Converting Set into String
In this approach, we convert set into a string and manipulate it.
Set<String> setdata = new Set<String>{‘T1’, ‘T2’, ‘T3’, ‘T4’};
String setString = string.valueof(setdata).replace(‘{‘, ”).replace(‘}’, ”);
System.debug(setString == ‘ + setString );
The best approach is the 2nd approach because it reduces the computation time.