Answers to Self-Review Questions - Java Software Solutions: Foundations of Program Design - page 748

object. For example, if you intend to use it for formatting percentages,
you might code:
NumberFormat fmt = NumberFormat.getPercentInstance();

SR 3.26 a. The statement is:

NumberFormat moneyFormat = NumberFormat.getCurrencyInstance();
Do not forget, you also must import java.text.NumberFormat into
your program.
b. The statement is:

System.out.println(moneyFormat.format(cost));
c. If the locale is the United States, the output will be $54.89 . If the
locale is the United Kingdom, the output will be £54.89 .

SR 3.27 To output a floating point value as a percentage, you first obtain a

NumberFormat object using a call to the static method getPercentage-
Instance of the NumberFormat class. Then, you pass the value to be
formatted to the format method of the formatter object, which returns
a properly formatted string. For example:
NumberFormat fmt = NumberFormat.getPercentageInstance();
System.out.println (fmt.format(value));

SR 3.28 The following code will prompt for and read in a double value from the

user and then print the result of taking the square root of the absolute
value of the input value to two decimal places:

Scanner scan = new Scanner (System.in);
DecimalFormat fmt = new DecimalFormat("0.00");
double value, result;
System.out.print ("Enter a double value: ");
value = scan.nextDouble();
result = Math.sqrt(Math.abs(value));
System.out.println (fmt.format(result));

3.7 Enumerated Types
SR 3.29 The following is a declaration of an enumerated type for movie ratings:

enum Ratings {G, PG, PG13, R, NC17}

SR 3.30 Under the listed assumptions, the output is:

clubs
hearts
0
2