Sum of two elements in a queue that equal 9

solution.java

import java.util.ArrayList; 

class solution {
  public static void main(String[] args) {
       int repository_numbers = 3;
      // int sumValues = 0;
       ArrayList<Integer> number_set = new ArrayList<Integer>(repository_numbers);
     
       // use add method to add elements into the list
          number_set.add(2);
          number_set.add(7);
          number_set.add(11);
          number_set.add(15);
        
        // prints all the elements available in list 
       
        //for (Integer number :  number_set) { 
         // I need to add the first element of the string to the next element of the string
//for(repository_numbers++; repository_numbers <number_set.size();repository_numbers++){

//This adds the number plus its next index

// System.out.println("The number set is Corey");
//for (int i = 0; i < number_set.size(); i++){
  //System.out.println(number_set.get(i));
//}


// This gives you a running total of sum values 
// int sumValues = (number);
  //        System.out.println("the sumValues is " + sumValues++ ) ;
    //      System.out.println ("the number set position" + number_set.get(0));
      //    System.out.println ("the number set position" + number_set.get(1));
        //  System.out.println ("the number set position" + number_set.get(2));
        //  System.out.println ("the number set position" + number_set.get(3));
          
      //sets the combinations
      
          // Prints out the combinations that equl 9 only of all number added to the previous one
            //Print out first element plus the next element in one line then add them together
          int combination_A = number_set.get(0) + number_set.get(1);
          System.out.println("the combination of combo A: " + (number_set.get(0) + " + " + (number_set.get(1))));
          System.out.println("is:" + combination_A);


          // int combination_B = number_set.get(0) + number_set.get(2);
          // System.out.println("the combination of combo B:" + (number_set.get(0) + " + " +( number_set.get(2))));
          // System.out.println("is:" + combination_B);


          // int combination_C = number_set.get(0) + number_set.get(3);
          // System.out.println("the combination of combo C:" + (number_set.get(0) + " + " +( number_set.get(3))));
          // System.out.println("is:" + combination_C);

          // int combination_D = number_set.get(1) + number_set.get(2);
          //System.out.println("the combination of combo D:" + (number_set.get(1) + " + " +( number_set.get(2))));
          //System.out.println("is:" + combination_D);

         // int combination_E = number_set.get(1) + number_set.get(3);
          //System.out.println("the combination of combo E:" + (number_set.get(1) + " + " +( number_set.get(3))));
          // System.out.println("is:" + combination_E);


        //  int combination_F = number_set.get(2) + number_set.get(3);
          // System.out.println("the combination of combo F:" + (number_set.get(2) + " + " +( number_set.get(3))));
          // System.out.println("is:" + combination_F);

          int combination_G = number_set.get(2) - number_set.get(0);
          System.out.println("the combination of combo G:" + (number_set.get(2) + " - " +( number_set.get(0))));
          System.out.println("is:" + combination_G);

          // System.out.println("the manual number is" + combination_B);
       
          // System.out.println("the manual number is" + combination_D); 
          // System.out.println("the manual number is" + combination_E); 
          // System.out.println("the manual number is" + combination_F); 


}





// Printing elements one by one 
//for (int i = 0; i<number_set.size(); i++) 
//System.out.print(number_set.get(i));
          
          
          // Prints out the combinations of all number added to the previous one
            //Print out first element plus the next element in one line add them together
      } 
  //} 




// define what equals 9 (logic)
// each time the number 9 shows up keep it
// each time any other number happens throw it away

// return the sets of numbers that equal 9
// let me know which combination works to get a nine