Create an empty project with a name of your choosing, and in that project create a package called

eecs$2030.$lab$3.$

Implement class Bird in the package eecs$2030.$lab$3$ that represents an immutable bird object.

$$ A bird has a type, represented as a string $($e$.$g$.,$Pigeon$,$Goose$,$Chicken$)$ and its

weight in grams $($non$-$whole numbers are possible$)$

$$ Two public constructors should exist:

public Bird$($String type, double sizeGrams$)$

public Bird$()$

The second constructor creates a Bird object of an unknown type, $350$ grams in weight

$$ Implement equals, hashCode, and toString methods. Two birds are to be considered

equal if they are of the same type, and their weight is equal when rounded to the nearest

multiple of $20$ g$.$ There is no set format for toString, as long both pieces of information

stored in the object are printed.

$$ Two additional public methods should exist:

public String getType$()$

public double getSizeGrams$()$

$$ Think about how the immutability is ensured whenever you implement a