Using BlueJ to solve questions

Answer all question, Each question carries $5$ Marks

Q$1.$ A$)$ Create a class, AirConditioner, that contains a single field temperature of type double.

B$)$ Define a constructor that takes no parameters. The temperature field should be set to

the value $18\mathrm{.}0$ in the constructor.

C$)$ Define the mutator method changeTemperature$()$ whose effect is to increase or

decrease the value of temperature by $3\mathrm{.}0$ respectively.

D$)$ Define an accessor method display$(0)$ to return the value of temperature.

E$)$ Create objects of the AirConditioner class and call the methods you created.

Q$2.$ Write a java programing to do the following:

A$)$ Create an ArrayList object called items that will store String elements. Add $4$ items to

the ArrayList and iterate over the collection.

B$)$ Create a HashMap object called Books that will store String keys and Integer values.

Add $3$ books$($bookname and bookprice$)$ to the HashMap.Using BlueJ to solve questions