Enum of Gender
public enum Gender { MALE,FEMALE; }
Person Class with getter , setter and override to string method.
public class Person { public Gender getGender() { return gender; } public void setGender(Gender gender) { this.gender = gender; } public Person(String fn, String ln, Gender g){ this.fName=fn; this.lName=ln; this.gender=g; } public String getfName() { return fName; } public void setfName(String fName) { this.fName = fName; } public String getlName() { return lName; } public void setlName(String lName) { this.lName = lName; } public String fName; public String lName; public Gender gender; public String getName(){ return getfName()+" "+getlName(); } @Override public String toString() { return getfName()+" "+getlName(); } }
and create person and display names
public static void main(String[] args) { // TODO Auto-generated method stub List<Person> persons=new ArrayList<>(); persons.add(new Person("Arnolad", "Jones", Gender.MALE)); persons.add(new Person("Zack", "Jones", Gender.MALE)); persons.add(new Person("Mary", "Jones", Gender.FEMALE)); persons.add(new Person("Anna", "Jones", Gender.FEMALE)); System.out.println(persons.stream() .sorted((p1,p2)->p1.getName().compareTo(p2.getName())) .collect(Collectors.groupingBy(Person::getGender)) ); }
Output:
{FEMALE=[Anna Jones, Mary Jones], MALE=[Arnolad Jones, Zack Jones]}
Happy Coding!!!
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