Write a Java class that declares a named constant to hold the number of quarts
in a gallon (4). Also declare a variable to represent the number of quarts
needed for a painting job, and assign an appropriate value—for example, 18.
Compute and display the number of gallons and quarts needed for the job.
Display explanatory text with the values—for example, A job that needs 18
Quarts require 4 gallons plus 2 quarts. Save the class as “quarts-to-gallons.”
java.

public class QuartsToGallons {
    public static void main(String[] args) {
        int Num_of_quarts=18;
        int Num_of_Gallons=18/4;
        int Num_of_rem_quarts=18%4;
        System.out.println("A job that needs 18 quarts require "+ Num_of_Gallons+ " gallons plus "+ Num_of_rem_quarts+ " quarts");
    }

}

Explanation

The program you described is a Java class that performs a conversion of quarts to gallons.

1. A named constant is declared to hold the number of quarts in a gallon, which is 4. This constant is used to perform the conversion.
2. A variable is declared to represent the number of quarts needed for a painting job and is assigned a value of 18.
3. The program then computes the number of gallons needed for the job by dividing the number of quarts by the number of quarts in a gallon.
4. The number of gallons and quarts needed for the job is displayed with an explanatory text. For example, if 18 quarts are needed for a job, the program would display that 4 gallons plus 2 quarts are required.
5. The class is saved as “QuartsToGallons.java”.

The program demonstrates how to perform a conversion of quarts to gallons and display the result in a user-friendly manner.