Answer:
Follows are the code to this question:
import java.util.*;//import package for user input
class GradePrinter//defining class GradePrinter
{
double numericValue = 0;//defining double variable
String grade = "";//defining String variable
GradePrinter()//defining default constructor
{
Scanner xb = new Scanner(System. in );//defining Scanner class object
System.out.print("Enter Grade: ");//print message
grade = xb.nextLine();//input string value
}
double getNumericGrade()//defining double method getNumericGrade
{
if (grade.equals("A+") || grade.equals("A"))//defining if block that check input is A+ or A
{
numericValue = 4.0;//using numericValue variable that hold float value 4.0
}
else if (grade.equals("A-"))//defining else if that check grade equals to A-
{
numericValue = 3.7;//using numericValue variable that hold float value 3.7
}
else if (grade.equals("B+"))//defining else if that check grade equals to B-
{
numericValue = 3.3;//using numericValue variable that hold float value 3.3
}
else if (grade.equals("B"))//defining else if that check grade equals to B
{
numericValue = 3.0;//using numericValue variable that hold float value 3.0
}
else if (grade.equals("B-"))//defining else if that check grade equals to B-
{
numericValue = 2.7;//using numericValue variable that hold float value 2.7
}
else if (grade.equals("C+"))//defining else if that check grade equals to C+
{
numericValue = 2.3; //using numericValue variable that hold float value 2.3
}
else if (grade.equals("C")) //defining else if that check grade equals to C
{
numericValue = 2.0; //using numericValue variable that hold float value 2.0
}
else if (grade.equals("C-")) //defining else if that check grade equals to C-
{
numericValue = 1.7;//using umericValue variable that hold float value 1.7
}
else if (grade.equals("D+"))//defining else if that check grade equals to D+
{
numericValue = 1.3;//using umericValue variable that hold float value 1.3
}
else if (grade.equals("D"))//defining else if that check grade equals to D
{
numericValue = 1.0;//using umericValue variable that hold float value 1.0
}
else if (grade.equals("F"))//defining else if that check grade equals to F
{
numericValue = 0;//using umericValue variable that hold value 0
}
else//defining else block
{
System.out.println("Letter not in grading system");//print message
}
return numericValue;//return numericValue
}
}
class Main//defining a class main
{
public static void main(String[] args)//defining main method
{
GradePrinter ob = new GradePrinter();// creating class GradePrinter object
double numericGrade = ob.getNumericGrade();//defining double variable numericGrade that holds method Value
System.out.println("Numeric Value: "+numericGrade); //print Value numericgrade.
}
}
Output:
Enter Grade: B
Numeric Value: 3.0
Explanation:
In the above-given code, a class "GradePrinter" is defined inside the class a string, and double variable "grade and numericValue" is defined, in which the grade variable is used for input string value from the user end.
After input, the sting value a method getNumericGrade is defined, which uses multiple conditional statements is used, which holds double value in the which is defined in the question.
In the main class, the "GradePrinter" object is created and defines a double variable "numericGrade", that calling method and store its value, and also use print method to print its value.