Look for some java help with this program.

I just two more things added to this code. A loop at the end that will ask the user if they want to quit if they do want to quit the program stops if they don't it loads a new number sequence. After that if two more classes MultipleOf3 and MultipleOf10 where added and put in the rand choice that would be helpful

Thanks

my code.

main.java

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections; // collection package is imported as array is used

import java.util.List; // list is a part of collection package

import java.util.Random;

import java.util.Scanner; // this is imported for user input

class Main // Main Class {

public static void main(String[] args) // Main method

{

List list = new ArrayList();// list is created for storage of array // intance of classe are put in the classified list list.add(new Fibonnaci()); // for fibonacci series

list.add(new MultipleOf5());// for multiple of 5

list.add(new MultipleOf8());// for the factors of 8

Random rand = new Random(); // Object is created for random class

int n = rand.nextInt(2)+1; // user input of int data type Sequence seq = list.get(n); // print statement for the input of next number in the series. System.out.print("What is the next number in this sequence? ");

Integer nums[] = seq.getSequence();// to retrieve the sequence

for(int i=0;i<6;i++) // for loop is defined {

System.out.print(nums[i]+", "); // print statement to print the numbers

}

System.out.println("..."); // print the ...

List randomNumbers = getRandomNumbers(nums);

if(!randomNumbers.contains(nums[6])) // for putting the correct answer in choice in //the case not yet present

{ int index = rand.nextInt(3)+1; //user input of int data type.

randomNumbers.set(index, nums[6]);

} // to the options to the users for(int i=0;i<4;i++) // for loop is defined

{ System.out.println(randomNumbers.get(i)); // print the no.s

}

Scanner scan = new Scanner(System.in); // Object for the scanner class id defined // For getting user's choice

System.out.print("Enter the number: ");// print statement to enter the numbers.

int num = scan.nextInt();// For the user input // if conditional statement is defined in order to check if the chosen number is correct or //not if(nums[6]==num)

System.out.println("Your choice was correct");// print if chosen number is right

else

System.out.println("Your choice was wrong");// print if the chosen number is not //right

scan.close();// method calling

}

public static List getRandomNumbers(Integer arr[])// in order to get the random //numbers fron the sequence array

{ Integer[] arr1 = new Integer[10];// object is created

for(int i=0;i<10;i++) // for loop

arr1[i] = arr[i]; //defining the array

List list = Arrays.asList(arr1); // array list is defined

Collections.shuffle(list);

return list.subList(0, 4); // shows the return

}

}

Sequence.java

interface Sequence // interface is defined for the method getSequence {

public Integer[] getSequence(); //getSequence method is defined

}

Fibonnaci.java

class Fibonnaci implements Sequence // inhetritance is used and interface sequence is implemented //by the class fibonacci

{

Integer[] arr = new Integer[10]; // Object is created

public Fibonnaci() // Constructor is defined as the name is similar to the class

{ fib(9); //for the calculation of Fibonacci series

} public Integer[] getSequence() // Again getSequence method is defined

{ return arr; // shows the array to be returned

} public int fib(int num) // variable is defined

{ if(num==0||num==1) // conditional statement if else is defined

{

if(arr[num]==null)

arr[num]=1;

return 1;

}

else

{ int fib = fib(num-1) + fib(num-2); // show the calculation for the fibonacci series

if(arr[num]==null) // if array will be empty

arr[num]=fib;

return fib; // shows the return value

}

}

}

MultipleOf8.java

class MultipleOf8 implements Sequence// Again inheritance is used and class MultipleOf8 implements //interface Sequence

{ Integer[] arr = new Integer[10]; // object is created

public MultipleOf8() // Default constructor

{

table(1,8); //recursion is used for table of 8

} public Integer[] getSequence() // GetSequence method

{ return arr; // return value

}

public int table(int i,int n) // variables { int num; // variables

if(i==11)// if else conditional statement {

return 0;

}

else{ // calculation for table num=n*i;

arr[i-1]= num;

return (table(++i,n)); // returns the table

}

}

}

MultipleOf5.java

class MultipleOf5 implements Sequence // again class MultipleOf5 implements interface Sequence //through inheritance

{ Integer[] arr = new Integer[10]; // object creation

public MultipleOf5() // default constructor is defined

{ table(1,5); //recursion is used for the table of 5

}

public Integer[] getSequence() // getSequence method

{ return arr;

} // Variables are defined public int table(int i,int n) { int num; // if else conditional statement if(i==11) { return 0; // returns zero

}

else{ // calculation for the table num=n*i;

arr[i-1]= num;

return (table(++i,n)); // returns the result as table

}

}

}