Instructions

Street Fighter 2

Solution:

package codewars.jan;//--https://www.codewars.com/kata/5853213063adbd1b9b0000be/train/java
//--https://www.codewars.com/kata/street-fighter-2-character-selection-part-2/train/java
import java.util.*;public class StreetFighter2 {private static String left(int i, int j, String[] arr) {int to = j;while (true) {to--;if (to == -1) {to = arr.length - 1;}if (!"".equals(arr[to])) {break;}}return String.format("%d%d%s", i, to, arr[to]);}private static String right(int i, int j, String[] arr) {int to = j;while (true) {to++;if (to == arr.length) {to = 0;}if (!"".equals(arr[to])) {break;}}return String.format("%d%d%s", i, to, arr[to]);}public static String[] superStreetFighterize(String[][] fighters,int[] position, String[] moves) {Map<String, String> map = new HashMap<String, String>();final int rows = fighters.length;final int cols = fighters[0].length;for (int i = 0; i < rows; i++) {for (int j = 0; j < cols; j++) {String fighter = fighters[i][j];if ("".equals(fighter)) {continue;}if (i == 0) {map.put(String.format("%d,%d-up", i, j),String.format("%d%d%s", i, j, fighters[i][j]));} else if ("".equals(fighters[i - 1][j])) {map.put(String.format("%d,%d-up", i, j),String.format("%d%d%s", i, j, fighters[i][j]));}else {map.put(String.format("%d,%d-up", i, j), String.format("%d%d%s", i - 1, j, fighters[i - 1][j]));}if (i == rows - 1) {map.put(String.format("%d,%d-down", i, j),String.format("%d%d%s", i, j, fighters[i][j]));} else if ("".equals(fighters[i + 1][j])) {map.put(String.format("%d,%d-down", i, j),String.format("%d%d%s", i, j, fighters[i][j]));}else {map.put(String.format("%d,%d-down", i, j), String.format("%d%d%s", i + 1, j, fighters[i + 1][j]));}map.put(String.format("%d,%d-left", i, j),left(i, j, fighters[i]));map.put(String.format("%d,%d-right", i, j),right(i, j, fighters[i]));}}List<String> list = new ArrayList<String>();String[] current = new String[] { String.valueOf(position[0]),String.valueOf(position[1]) };for (int i = 0; i < moves.length; i++) {String value = map.get(String.format("%s,%s-%s", current[0],current[1], moves[i]));list.add(value.substring(2));current[0] = String.valueOf(value.charAt(0));current[1] = String.valueOf(value.charAt(1));}return list.toArray(new String[0]);}
}