how do i get the expected output(domain name,employee names) from below code using java

Hi Experts,

i want to display domain name and employee names.
below are the reocords getting from db .

domain      fullname

admin      	srini
admin		vasu
admin		rao
DB			pavan
DB			venkat
DB			simha
java		        sneha
java		        sharma
java		         karan

i want to display the output like below

admin    srini
DB		pavan
java	        sneha

how do i get the expected output.
List<Object> domainDetails = dao.getStaffInfo()//getting the records from db
Map<String,String> map = new HashMap<>();
for(Object object : domainDetails){
Object[] row = (Object[])object;
return map;

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can some one suggest me
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if(!domainDetails.isEmpty()) {
  Map<String,String> map = new HashMap<>();

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instead of that, you probably want

if(!domainDetails.isEmpty()) {
  Map<String, List<String>> map = new HashMap<>();

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If the key (domain) exists in the Map, add fullname to the List (the value) else create a new List and add fullname to the List

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