Use a single Scanner to read input.

The following program counts the total number of letters in a person's first and last names. The getAndCountNameLetters() method creates a Scanner, reads a name from the user input, and returns the number of letters.

Run the program. Note that the program does not count letters in the last name. The first call to scnr.next() returns the first name, but also reads the last name to make future reads faster. The second call to getAndCountNameLetters() creates a different Scanner, which has nothing left to read.

Change the program by passing a Scanner to the getAndCountNameLetters() method.

Run the program again. Note that the count now includes the last name.

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1 import java.util.Scanner; 3 public class NameLettersCounter { H~3456789 2 4 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 m m m m m m 31 32 33 34 35 } 56 36 // FIXME: Specify a Scanner as a method parameter public static int getAndCountNameLetters() { } // FIXME: Use the Scanner parameter instead of creating one every time Scanner scnr = new Scanner(System.in); String name = ""; } if (scnr.hasNext()) { name = scnr.next(); } return name.length(); public static void main(String[] args) { int firstNameLetterCount; int lastNameLetterCount; // FIXME: Create a Scanner here System.out.println("Enter a person's first and last names:"); // The first method call will read both first and last names // FIXME: Pass the Scanner as an argument to both method calls firstNameLetterCount = getAnd CountNameLetters(); lastNameLetterCount = getAndCountNameLetters(); System.out.println("The first name has " + firstNameLetterCount + " letters."); System.out.println("The last name has " + lastNameLetterCount + " letters."); 1 import java.util.Scanner; 3 public class NameLettersCounter { H~3456789 2 4 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 m m m m m m 31 32 33 34 35 } 56 36 // FIXME: Specify a Scanner as a method parameter public static int getAndCountNameLetters() { } // FIXME: Use the Scanner parameter instead of creating one every time Scanner scnr = new Scanner(System.in); String name = ""; } if (scnr.hasNext()) { name = scnr.next(); } return name.length(); public static void main(String[] args) { int firstNameLetterCount; int lastNameLetterCount; // FIXME: Create a Scanner here System.out.println("Enter a person's first and last names:"); // The first method call will read both first and last names // FIXME: Pass the Scanner as an argument to both method calls firstNameLetterCount = getAnd CountNameLetters(); lastNameLetterCount = getAndCountNameLetters(); System.out.println("The first name has " + firstNameLetterCount + " letters."); System.out.println("The last name has " + lastNameLetterCount + " letters.");

Answer rating: 100% (QA)

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