0
Я пытаюсь напечатать имя студента с самым низким показателем викторины в моей программе.Поиск ключа в пределах карты
К сожалению, мне не удастся выяснить способ использования метода getKey() для определения имени студента. Вопрос, который у меня есть, находится в пределах:
else if (choice == 4)
Любая помощь будет очень признательна.
public class StudentQuizGrades {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
Map<String, Student> map = new HashMap<>();
addStudent(map);
}
private static void addStudent(Map<String, Student> map) {
Scanner userInput = new Scanner(System.in);
Set<String> keySet = map.keySet();
boolean finish = false;
int studentID = 0;
do {
System.out.println("Please choose an option: ");
System.out.println("Add student and quizzes - 1, Get all quiz scores - 2, Get highest quiz score- 3, ");
System.out.println("Get lowest quiz score - 4, Get class average - 5, Quit - 6");
int choice = userInput.nextInt();
if (choice == 1) {
System.out.println("How many students would you like to add?");
int numberOfStudents = userInput.nextInt();
for (int counter = 0; counter < numberOfStudents; counter++) {
System.out.println("ENTER NAME");
Scanner addName = new Scanner(System.in);
String name = (addName.nextLine());
System.out.println("Enter First Quiz Score");
Scanner addQuiz1 = new Scanner(System.in);
int quiz1 = (addQuiz1.nextInt());
System.out.println("Enter Second Quiz Score");
Scanner addQuiz2 = new Scanner(System.in);
int quiz2 = (addQuiz2.nextInt());
System.out.println("Enter Third Quiz Score");
Scanner addQuiz3 = new Scanner(System.in);
int quiz3 = (addQuiz3.nextInt());
Student student = new Student(name, quiz1, quiz2, quiz3);
map.put(student.getKey(), student);
}
} else if (choice == 2) {
for (String currentKey : keySet) {
Student student = map.get(currentKey);
System.out.println(currentKey);
System.out.println(Arrays.toString(student.getQuizGrades()));
}
} else if (choice == 3) {
int max = 0;
for (String currentKey : keySet) {
Student student = map.get(currentKey);
int[] scores = student.getQuizGrades();
for (int counter = 1; counter < scores.length; counter++) {
if (scores[counter] > max) {
max = scores[counter];
}
}
}
System.out.println("The highest quiz score was " + max);
} else if (choice == 4) {
int min = 0;
for (String currentKey : keySet) {
Student student = map.get(currentKey);
int[] scores = student.getQuizGrades();
int index = 0;
min = scores[0];
for (int counter = 1; counter < scores.length; counter++) {
if (scores[counter] < min) {
min = scores[counter];
index = counter;
}
}
studentID = index;
}
System.out.println("The lowest quiz score was " + min);
} else if (choice == 5) {
int[] allGrades;
int sum = 0;
int counter2 = 0;
for (String currentKey : keySet) {
Student student = map.get(currentKey);
int[] scores = student.getQuizGrades();
for (int counter = 0; counter < scores.length; counter++) {
int j = scores[counter];
sum = sum + j;
counter2++;
}
}
int average = sum/counter2;
System.out.println("The class average is: " + average);
} else if (choice == 6) {
finish = true;
break;
}
} while (finish == false);
}
}
public class Student {
private String key;
private int grade1;
private int grade2;
private int grade3;
public Student(String key, int grade1, int grade2, int grade3){
this.key = key;
this.grade1 = grade1;
this.grade2 = grade2;
this.grade3 = grade3;
}
public String getKey(){
return key;
}
public int[] getQuizGrades(){
int [] anArray = {grade1, grade2, grade3};
return anArray;
}
public int getAverageScore(){
int average = (grade1 + grade2 + grade3)/3;
return average;
}
}