I started learning Java 2 weeks ago, so I don't know that much. I recently made a working console quiz and I'm wondering if there is a simpler way to do it.
import java.util.*;
import java.io.*;
class StudyBot
{
static int[][][] GradeValues = {{{93, 100}, {90, 92}}, {{87, 89}, {83, 86}, {80, 82}}, {{77, 79}, {73, 76}, {70, 72}}, {{67, 69}, {64, 66}}, {{0, 63}}};
static Scanner istr = new Scanner(System.in), iint = new Scanner(System.in);
static Map<String, Object> data = new HashMap<String, Object>();
static boolean word_Prob, multi_Choice;
static double correct = 0, incorrect = 0;
static int question_Number = 0, amount_Of_Questions = 10;
static String result = "";
public static void main(String[] args)
{
new StudyBot();
}
public StudyBot()
{
setupData(); mainMenu();
}
void mainMenu()
{
printline(0);
print("[StudyBot] Welcome to StudyBot!");
printline(0);
print("[StudyBot] Pick a Mode: Study OR Add Data");
String input = istr.nextLine();
if(input.equalsIgnoreCase("Study")) start();
else if(input.equalsIgnoreCase("Add Data")) addData();
else print("Invaild mode!"); mainMenu();
}
void start()
{
for(int index = 0; index < (amount_Of_Questions + 1); index++)
{
if(!(index < amount_Of_Questions))
{
double percentage = (correct / amount_Of_Questions) * 100;
printline(0);
print("[# of Questions] " + amount_Of_Questions);
print("[Correct] " + correct);
print("[Incorrect] " + incorrect);
print("[Percentage] " + percentage + "%");
print("");
print("[Grade] " + getLetterGrade(percentage));
print("[GPA] " + getGPA(percentage));
break;
}
else setupData(); pickQuestion();
}
}
void setupData()
{
/* INPUT DATA HERE
*
* key = question
* value = answer
*
* EX: data.put(key1, value1);
* data.put(key2, value2);
* data.put(key3, value3);
* etc....
*/
}
void addData()
{
print("Enter key:");
String key = istr.nextLine();
if(!(key.equalsIgnoreCase("main menu")))
{
print("Enter value:");
String value = istr.nextLine();
data.put(key, value);
addData();
}
else mainMenu();
}
void displayData(String s)
{
Set set = data.entrySet();
Iterator i = set.iterator();
while(i.hasNext())
{
Map.Entry e = (Map.Entry)i.next();
String key = e.getKey().toString();
String k = (String) e.getKey(), v = (String) e.getValue();
String data = ((s != null ? (key.equals(s) ? (k + ": " + v) : null) : (k + ": " + v)));
if(data != null) print(data);
}
}
void pickQuestion()
{
List<String> keys = new ArrayList<String>(data.keySet());
String key = keys.get(rand(keys.size()));
String value = (String) data.get(key);
askQuestion(key, value);
}
void askQuestion(String question, String answer)
{
questionType();
if(word_Prob) wordProblem(question, answer);
else multiChoice(question, answer);
}
void wordProblem(String question, String answer)
{
question_Number++;
printline(0);
print("[Question " + question_Number + "] What is " + question + "?");
printline(1);
String user_Answer = istr.nextLine();
String[] user_Words = user_Answer.split(" "), answer_Words = answer.split(" ");
List<String> matched_Words = new ArrayList();
for(String i : user_Words)
for(String j : answer_Words)
if(i.equalsIgnoreCase(j)) matched_Words.add(i);
int num_Of_Matched_Words = matched_Words.size();
int x = num_Of_Matched_Words, y = answer_Words.length;
String result = ((x >= (y / 2)) ? "Correct!" : (((x > (y / 3)) && ((y / 2) > x)) ? "Almost!" : "Incorrect! Answer was " + answer));
if(result.equals("Correct!")) correct++;
else if(result.equals("Incorrect! Answer was " + answer)) incorrect++;
else if(result.equals("Almost!")) correct += 0.5;
print(result);
}
void multiChoice(String Q, String A)
{
boolean repeat = true;
String question = Q, answer = A;
String[] ABCD_key = {randKey(), randKey(), randKey()};
while(repeat)
{
ABCD_key[0] = (ABCD_key[0].equals(question)) || (ABCD_key[0].equals(ABCD_key[1])) || (ABCD_key[0].equals(ABCD_key[2])) ? randKey() : ABCD_key[0];
ABCD_key[1] = (ABCD_key[1].equals(question)) || (ABCD_key[1].equals(ABCD_key[0])) || (ABCD_key[1].equals(ABCD_key[2])) ? randKey() : ABCD_key[1];
ABCD_key[2] = (ABCD_key[2].equals(question)) || (ABCD_key[2].equals(ABCD_key[0])) || (ABCD_key[2].equals(ABCD_key[1])) ? randKey() : ABCD_key[2];
repeat = (!(ABCD_key[0].equals(ABCD_key[1])) && !(ABCD_key[0].equals(ABCD_key[2])) && !(ABCD_key[1].equals(ABCD_key[2]))) ? false : true;
}
repeat = true;
String[] ABCD_option = {(String) data.get(question), (String) data.get(ABCD_key[0]), (String) data.get(ABCD_key[1]), (String) data.get(ABCD_key[2])};
int x = rand(0, 3), y = rand(0, 3), z = rand(0, 3), t = rand(0, 3);
while(repeat)
{
y = (y == x) ? rand(0, 3) : y;
z = (z == x || z == x) ? rand(0, 3) : z;
t = (t == z || t == y || t == x) ? rand(0, 3) : t;
repeat = ( !(y == x) && !(y == z) && !(y == t) && !(z == x) && !(z == t) && !(x == t) ) ? false : true;
}
String a = ABCD_option[x], b = ABCD_option[y], c = ABCD_option[z], d = ABCD_option[t];
String letter = a.equals(ABCD_option[0]) ? "A" : (b.equals(ABCD_option[0]) ? "B" : (c.equals(ABCD_option[0]) ? "C" : (d.equals(ABCD_option[0]) ? "D" : "")));
boolean has_Repeated_Questions = ((!(letter.equals("A"))) && (!(letter.equals("B"))) && (!(letter.equals("C"))) && (!(letter.equals("D"))));
if(!has_Repeated_Questions)
{
question_Number++;
displayQuestion(question, a, b, c, d);
String user_Answer = istr.nextLine();
boolean matches = user_Answer.equalsIgnoreCase(letter);
boolean menu = user_Answer.equalsIgnoreCase("main menu");
result = (menu ? "" : (matches ? "Correct!" : "Incorrect! Answer was " + letter));
if(menu) mainMenu();
if(matches) correct++;
else incorrect++;
print(result);
}
else multiChoice(question, answer);
}
void displayQuestion(String question, String a, String b, String c, String d)
{
printline(0);
print("[Question " + question_Number + "] What is " + question + "?");
printline(1);
print("[A] " + a);
print("[B] " + b);
print("[C] " + c);
print("[D] " + d);
printline(1);
}
String randKey()
{
List<String> keys = new ArrayList<String>(data.keySet());
return keys.get(rand(keys.size()));
}
void questionType()
{
Random random = new Random();
boolean type = (random.nextInt(2) == 1) ? true : false;
this.word_Prob = type;
this.multi_Choice = !type;
}
String getLetterGrade(double percentage)
{
return isBetween(percentage, GradeValues[0][0][0], GradeValues[0][0][1]) ? "A" : (isBetween(percentage, GradeValues[0][1][0], GradeValues[0][1][1]) ? "A-" : (isBetween(percentage, GradeValues[1][0][0], GradeValues[1][0][1]) ? "B+" :
(isBetween(percentage, GradeValues[1][1][0], GradeValues[1][1][1]) ? "B" : (isBetween(percentage, GradeValues[1][2][0], GradeValues[1][2][1]) ? "B-" : (isBetween(percentage, GradeValues[2][0][0], GradeValues[2][0][1]) ? "C+" :
(isBetween(percentage, GradeValues[2][1][0], GradeValues[2][1][1]) ? "C" : (isBetween(percentage, GradeValues[2][2][0], GradeValues[2][2][1]) ? "C-" : (isBetween(percentage, GradeValues[3][0][0], GradeValues[3][0][1]) ? "D+" :
(isBetween(percentage, GradeValues[3][1][0], GradeValues[3][1][1]) ? "D" : (isBetween(percentage, GradeValues[4][0][0], GradeValues[4][0][1]) ? "F" : ("None")))))))))));
}
double getGPA(double percentage)
{
return isBetween(percentage, GradeValues[0][0][0], GradeValues[0][0][1]) ? 4.0 : (isBetween(percentage, GradeValues[0][1][0], GradeValues[0][1][1]) ? 3.7 : (isBetween(percentage, GradeValues[1][0][0], GradeValues[1][0][1]) ? 3.3 :
(isBetween(percentage, GradeValues[1][1][0], GradeValues[1][1][1]) ? 3.0 : (isBetween(percentage, GradeValues[1][2][0], GradeValues[1][2][1]) ? 2.7 : (isBetween(percentage, GradeValues[2][0][0], GradeValues[2][0][1]) ? 2.3 :
(isBetween(percentage, GradeValues[2][1][0], GradeValues[2][1][1]) ? 2.0 : (isBetween(percentage, GradeValues[2][2][0], GradeValues[2][2][1]) ? 1.7 : (isBetween(percentage, GradeValues[3][0][0], GradeValues[3][0][1]) ? 1.3 :
(isBetween(percentage, GradeValues[3][1][0], GradeValues[3][1][1]) ? 1.0 : (isBetween(percentage, GradeValues[4][0][0], GradeValues[4][0][1]) ? 0.0 : (0.0)))))))))));
}
boolean isBetween(double x, double lower, double upper)
{
return lower <= x && x <= upper;
}
int rand(int min, int max)
{
Random random = new Random();
return random.nextInt((max - min) + 1) + min;
}
int rand(int max)
{
Random random = new Random();
return random.nextInt(max);
}
void print(Object o)
{
System.out.println(o);
}
void printline(int type)
{
switch(type)
{
case 0: print("============================================================="); break;
case 1: print("-------------------------------------------------------------"); break;
}
}
}
