BotsAI/src/SnakeBot.java

import java.util.Random;

public class SnakeBot extends Bot{
    String moves = "";
    private boolean goesForward = true;
    private int circleNumber = 0;
    private int spiralNumber = 0;
    private boolean ignoreStone = false;
    public static void main(String[] args) {
        Bot snakeBot = new SnakeBot(args);
        snakeBot.run();
    }
    protected SnakeBot(String[] args) {
        super(args);
    }
    //@TODO
    protected char nextMove(View view){
        boolean stoneDetected = view.data.contains("@");
        char nextMove;
        nextMove = stoneDetected && !ignoreStone ? goToStone(view) : walkBySpiral();

        if(nextMove == '^' && view.data.charAt(7) == '*'){
            Random random = new Random();
            nextMove = (random.nextInt(2) % 2 == 0) ?  '<' : '>';
            ignoreStone = true;
        }
        if(countCollectedStones(view) <= 2) ignoreStone = false;
        return nextMove;
    }
    private int countCollectedStones(View view) {
        int count = 0;

        for (char c : view.data.toCharArray()) {
            if (c == '*') {
                count++;
            }
        }
        return count;
    }
    private char goToStone(View view){
        int rowDifference = findStoneRow(view) - 2;
        return rowDifference < 0 ? '^' : '<';
    }

    private int findStoneRow(View view) {
        return view.data.indexOf('@') / 5;
    }
    private char walkByColumns() {
        if(moves.isEmpty()){
            moves = "^".repeat(28);
            moves += (goesForward ? ">^^^^^>" : "<^^^^^<");
            goesForward = !goesForward;
        }
        char nextMove = moves.charAt(0);
        moves = moves.substring(1);
        return nextMove;
    }
    private char walkByCircles(){
        if (moves.isEmpty()) {
            circleNumber++;
            moves += "^".repeat(5) + ">";
            int[] steps = {5, 10, 10, 10};

            for (int step : steps) {
                moves += "^".repeat(step * circleNumber) + ">";
            }

            moves += "^".repeat(5 * circleNumber) + "<";
        }
        char nextMove = moves.charAt(0);
        moves = moves.substring(1);
        return nextMove;
    }
    private char walkBySpiral(){
        if (moves.isEmpty()) {
            spiralNumber++;
            moves += "^".repeat(5 * spiralNumber) + ">" + "^".repeat(5 * spiralNumber) + ">";
        }
        char nextMove = moves.charAt(0);
        moves = moves.substring(1);
        return nextMove;
    }
}