Myujth

I am trying to implement a function in JAVA which would give me a List of Pairs of Numbers.

This pair of numbers which would add up to 5, so ultimate goal is to print this list of pair of numbers

I have this code to determine pair but not sure how to return from method.
Please Note: I have used void as I have no clue of how to return values from method in the form (numberA[0], numberB[0]), (numberA[1], numberB[1]), ....?

public void setNumberList(int numberList) 

 ArrayList<Integer> numberA = new ArrayList<Integer>();
 ArrayList<Integer> numberB = new ArrayList<Integer>();

 for (int i = 0; i < numberList.length; i++) 

 int first = numberList[i];

 for (int j = i + 1; j < numberList.length; j++) 

 int second = numberList[j];

 if ((first + second) == 5) 

 numberA.add(first);
 numberB.add(second);
 
 
 

You can change the return type of your method to Set<List<Integer>>. The Set will contain lists of numbers, where the numbers in each list will sum up to your target number 5. The method will look like this:

public static Set<List<Integer>> setNumberList(int numberList) 

 ArrayList<Integer> numberA = new ArrayList<Integer>();
 ArrayList<Integer> numberB = new ArrayList<Integer>();

 for (int i = 0; i < numberList.length; i++) 

 int first = numberList[i];

 for (int j = i + 1; j < numberList.length; j++) 

 int second = numberList[j];

 if ((first + second) == 5) 

 numberA.add(first);
 numberB.add(second);
 
 
 
 Set<List<Integer>> result = new HashSet<List<Integer>>();
 for (int i=0; i<numberA.size(); i++) 
 int n1 = numberA.get(i);
 int n2 = numberB.get(i);
 List<Integer> numbersToAdd = Arrays.asList(n1, n2);
 result.add(numbersToAdd);
 
 return result;