java random array

Question

ich möchte die frage zufällig machen, und wenn ich die antwort zu vergleichen, wenn sie richtige antwort sind oder nicht ?? kann mir jemand ein wenig helfen?

 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.util.Random;
 

public class Main {
 

public static void main(String[] args) { 


     String[] aa = { "question aa" }; 
     String[] bb = { "question bb"}; 
     String[] cc = { "question cc"}; 
     String[] dd = { "question dd"}; 

     String[] e = { "answer to question aa" }; 
     String[] f = { "answer to question bb"}; 
     String[] g = { "answer to question cc"}; 
     String[] h = { "answer to question dd"}; 



    // should be here the random question 

     System.out.print("Enter your answer: "); 

     BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); 

    String userAnswer = null; 

    try { 
    userAnswer = br.readLine(); 
    } catch (IOException ioe) { 
    System.out.println("IO error trying to read your answer!"); 
    System.exit(1); 
    } 

    System.out.println("Thanks for the answer, " + userAnswer); 

}

Answer 1

class QuestionAnswer{ 
String q; 
String a; 
//getters/setters and const. 
} 

erstellen DS als Ihre Frage Satz kleiner und ratsam ist, im Speicher zu halten

List<QuestionAnswer> lst = new ArrayList<QuestionAnswer>(); 
lst.add(new QuestionAnswer("Question1","Answer1")); 
lst.add(new QuestionAnswer("Question2","Answer2")); 
lst.add(new QuestionAnswer("Question3","Answer3")); 

ein Generieren lief dom ganze Zahl von 0 bis list.size()

Random r = new Random(); 
int index = r.nextInt(lst.size()); 

Frage es holen und ausdrucken und Benutzer akzeptieren; s Antwort

System.out.println(lst.get(index).getQ()); 
Scanner in = new Scanner(System.in); 
// Reads a single line from the console 
String answer = in.nextLine(); 

Vergleichen Antwort des Benutzers mit der Liste

if(answer.equalsIgnoreCase(lst.get(index).getA())){ 
    System.out.println("You are correct. !!"); 
} 

Answer 2

• Halten Sie Fragen in Fragen Array Questi auf [] [] = {aa, bb ...};
• Antworten in Antworten behalten array arrays [] [] = {e, f ...};
• Zufallszahl zwischen 0 und questions.length

• Fragen [random] und Antworten [random] sollte

  String[] aa = { "question aa" }; 
  String[] bb = { "question bb" }; 
  String[] cc = { "question cc" }; 
  String[] dd = { "question dd" }; 
  
  
  String[][] questions = { aa, bb, cc, dd }; 
  
  
  String[] e = { "answer to question aa" }; 
  String[] f = { "answer to question bb" }; 
  String[] g = { "answer to question cc" }; 
  String[] h = { "answer to question dd" }; 
  
  
  String[][] answers = { e, f, g, h }; 
  
  
  int min = 0; 
  int max = 5; 
  int random= 0; 
  
  
  random = min + (int) (Math.random() * max); 
  
  
  questions[random]; 
  answers[random];