
Concept explainers
Explanation of Solution
Program code:
Main.java
//import the required packages
import java.io.File;
import java.util.Arrays;
import java.util.Scanner;
//define a class inputStats
public class Main
{
//define the main
public static void main(String[] args) throws Exception
{
//create the object of File class
File fileName = new File("file.txt");
//create the object of Scanner class to refer the file
Scanner in = new Scanner(fileName);
//call the method plusScores()
plusScores(in);
}
//define a method plusScores()
public static void plusScores(Scanner in)
{
//iterate a while loop
while(in.hasNextLine())
{
//declare two string variables to get the lines
String name = in.nextLine();
String score = in.nextLine();
//declare the integer variables
int n=0;
int p=0;
//iterate a for loop to get the count
for (int i=0; i<score.length(); i++)
{
//if the character is +
if(score.charAt(i) == '+')
{
//increment the value of p by 1
p++;
}
//increment the value of n by n
n++;
}
//print the percentage
System.out.printf("%s: %.1f%% plus\n", name, 100.0*p/n);
}
}
}
carroll.txt
Kane, Erica
--+-+
Chandler, Adam
++-+
Martin, Jake
+++++++
Dillon, Amanda
++-++-+-
Explanation:
The above snippet of code is used to create a method called “plusScores()” that accepts a Scanner representing an input file containing a series of lines that represent student records...

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Chapter 6 Solutions
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