Question

Define a class to represent a Temperature. Your class should contain

• Instance variable int fahrenheit
• A parameterized constructor;
• Member method to calculate the equivalent temperature in Celsius unit toCelsius() with decimal value.
  • double toCelsius()
  • Conversion formula: celsius= (fahrenheit - 32) * 5/9
• Method definition to override the equals() method
  • boolean equals(Object obj)

Answer 1

The code for the given problem statement is given below. Since programming language is not mentioned so Java is used to implement. All the steps are given in comments and output is given. It has class Temperature which has two methods. toCelsius is used to convert Fahrenheit to celcius and returns Celsius value and equals compares two objects and returns true if both objects are equal.

//Code starts here

//This class Temperature has two methods : Convert Fahernheit to Celcius and to compare Objects
public class Temperature
{
   int fahrenheit; //Instance variable to store Fahernheit temperature
public Temperature(int fahrenheit){ //parameterized constructor
this.fahrenheit = fahrenheit;
}
public double toCelsius(){ //Member method to calculate the equivalent temperature in Celsius unit with decimal value.
double celsius= (((double)this.fahrenheit - 32) * 5/9)/100 * 100; //Conversion formula from Fahernheit to Celsius
return celsius; //return Celsius temperature
}
public boolean equals(Object obj){ //Method definition to override the equals() method. It compares objects
if(obj == this) //If object is compared with itself return true
return true;
if(!(obj instanceof Temperature)) // If given object is not instance of Temperature class return false
return false;
Temperature temperature = (Temperature) obj; // Otherwise convert object to temperature object and compare
return (fahrenheit == temperature.fahrenheit); //return true if fahrenheit temperature are same otherwise false
}
   public static void main(String[] args) {
       Temperature t = new Temperature(43); //First object of Temperature class
       System.out.println("42 in Fahrenheit is equal to : " + t.toCelsius() + " Celsius"); //Call toCelsius method to convert Fahernheit to Celsius
       Temperature t2 = new Temperature(42); //Second object of Temperature class
       System.out.println("Are objects equal?");
       System.out.println(t.equals(t2)); //Call equals method to compare two objects
   }
}

//Code ends here

Output