Design and Architecture

for(int item1 = 0; item1 < 6; ++item1){
    for(int item2 = item1+1; item2 < 6; ++item2){
        for(int item3 = item2+1; item3 < 6; ++item3){
            System.out.println(item1 + " " + item2 + " " + item3);
        }
    }
}

int setSize = 6;
int numberOfItemsToChoose = 3;

ItemSet itemSet = new ChooseItem(setSize);

for(int i=0; i < numberOfItemsToChoose-1; ++i)
    itemSet = new ChooseAdditionalItem(itemSet);

Queue<String> waysToChoose = itemSet.chooseItems();

for(String aWayToChoose : waysToChoose)
    System.out.println(aWayToChoose);