I have a list containing a set of numbers in ascending order. I have another set of numbers containing a few elements.

I need to check the difference between elements in a list such that they are present in a set and if the difference is 5 or more. I need to delete all the numbers higher than it. Example:

list contains {1,5,7,8,12,17,18}

set= {7,12,21}

I run a loop in a list pointing two elements. In the first 1 and 5. Since both of them are not in the set no need to calculate the difference.

We continue the same process till 7 and 8. Here, I need to check the difference between 7,8 but since 8 is not in the set, I need to do increments such that the difference between 12 and 7 is calculated. If the difference is 5 or more I need to delete all elements from the list which are higher than the number from set. i.e 7

In this case elements deleted from list are {8,12,17,18}. Only numbers below the number from the set are deleted with a condition that at least two numbers from the set are in the list and their gap is at least 5.

Here is the sample code I have written so far

for (int i=1;i<list.size();i ){

if(set.contains(list[i]) && set.contains(list[i 1]))

This checks only successive values and doesn't move ahead. How to make this dynamic?

CodePudding user response：

Please find the below code, and in the final if block you can put the code to do print, remove etc on the element.

        import java.util.ArrayList;
        import java.util.List;
        import java.util.*;
        class HelloWorld {
            public static void main(String[] args) {
                
                List<Integer> ScoreList = new ArrayList<Integer>();
                ScoreList.add(1);
                ScoreList.add(5);
                ScoreList.add(7);
                ScoreList.add(12);
                ScoreList.add(17);
                ScoreList.add(18);
                ScoreList.add(21);
                ScoreList.add(31);
                ScoreList.add(41);
                Set<Integer> a = new HashSet<Integer>();
                a.add(7);
                a.add(12);
                a.add(21);
                
                for(int i=0; i<ScoreList.size(); i  )
                {
                    for(int j=0;j<ScoreList.size();j  )
                    {
                        
                        if(a.contains(ScoreList.get(i)) && a.contains(ScoreList.get(j)))
                        {
                            
                            
                                if(ScoreList.get(j) - ScoreList.get(i) >5)
                                {
                                    System.out.println(ScoreList.get(i) " ");
                                    // Add your code here to remove and add it to another list.etc.
                                }
                            
                            
                        }
                    }
                }
            
            }
        }