class Ant {
    public String name = "unknownAnt";
    public String color = "red";
    public boolean isWarrior = false;
    public int age = 0;
}
// shh, it's a tiny ant colony
List<Ant> antColony = new ArrayList<>(100);
// fill the colony with ants
// count the warrior ants
long numOfWarriors = 0;
for (Ant ant : antColony) {
    if (ant.isWarrior) {
         numOfWarriors++;
    }
}

class AntColony {
    public int size = 0;
    public String[] names = new String[100];
    public String[] colors = new String[100];
    public int[] ages = new int[100];
    public boolean[] warriors = new boolean[100];
    // I am aware of the fact that this array could be removed
    // by splitting the colony in two (warriors, non warriors),
    // but that is not the point of this story.
    //
    // Yes, you can also sort it and enjoy in an additional
    // speedup due to branch predictions.
}
AntColony antColony_do = new AntColony();
// fill the colony with ants and update size counter
// count the warrior ants
long numOfWarriors = 0;
for (int i = 0; i < antColony_do.size; i++) {
    boolean isWarrior = antColony_do.warriors[i];
    if (isWarrior) {
        numOfWarriors++;
    }
}

long numOfChosenAnts = 0;
for (Ant ant : antColony) {
    if (ant.age > 1 && "red".equals(ant.color)) {
        numOfChosenAnts++;
    }
}

long numOfChosenAnts = 0;
for (int i = 0; i < antColony.size; i++) {
    int age = antColony.ages[i];
    String color = antColony.colors[i];
    if (age > 1 && "red".equals(color)) {
        numOfChosenAnts++;
    }
}