Maintainable HashCode and Equals Using Apache Commons

@Override

publicinthashCode() {

finalintprime =31;

intresult =1;

result = prime * result + ((firstName ==null) ?0: firstName.hashCode());

result = prime * result + ((lastName ==null) ?0: lastName.hashCode());

returnresult;

}

@Override

publicbooleanequals(Object obj) {

if(this== obj)

returntrue;

if(obj ==null)

returnfalse;

if(getClass() != obj.getClass())

returnfalse;

Person other = (Person) obj;

if(firstName ==null) {

if(other.firstName !=null)

returnfalse;

}elseif(!firstName.equals(other.firstName))

returnfalse;

if(lastName ==null) {

if(other.lastName !=null)

returnfalse;

}elseif(!lastName.equals(other.lastName))

returnfalse;

returntrue;

}

@Override

publicbooleanequals(Object obj) {

returnEqualsBuilder.reflectionEquals(this, obj);

}

@Override

publicinthashCode() {

returnHashCodeBuilder.reflectionHashCode(this);

}