Group by field name in Java

Question

I\'m trying to group Java objects by their field, i.e Person.java

public class Person {
    String name;
    String surname;
    ....
}

Answer 1

First of all you should add objects of Person.java in the arraylist later we can get back those details in below manner

public void addPerson(){

ArrayList presonList = new ArrayList();

for( int i=0;i<=presonList.size() ; i++){

Person obj = presonList.get(i);

//now do the stuff of getting individual variable here

}

}