Java Factory Pattern Simple Code

Info
In simple words, if we have a super class and n sub-classes, and based on data provided, 
we have to return the object of one of the sub-classes,  then we should use a factory pattern concept

Code
class Person {

public String name;
private String gender;

public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}

public void setGender(String gender) {
this.gender = gender;
}
public String getGender() {
return gender;
}

}


class Male extends Person {
  public Male(String fullName) {
setName(fullName);
setGender("Male");
}
public String toString(){
System.out.println("----Person Detail----- ");
System.out.println("Mr. "+getName());
System.out.println("Name : "+getName());
System.out.println("Gender : "+getGender());
return "";
}
}

class Female extends Person {
  public Female(String fullName) {
setName(fullName);
setGender("Female");
}
public String toString(){
System.out.println("----Person Detail----- ");
System.out.println("Ms. "+getName());
System.out.println("Name : "+getName());
System.out.println("Gender : "+getGender());
return "";
}

}

class FactoryPatternEngine{
  public static void main(String args[]) {

FactoryPatternEngine  factory = new FactoryPatternEngine();
Person  person = factory.getPerson(args[0], args[1]);
System.out.println(person);

}
public Person getPerson(String name, String gender) {
if (gender.equals("M")){
return new Male(name);
}else if(gender.equals("F")){
return new Female(name);
}else{
return null;
}
}

}

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