Kayak 代码面试题中的有关按照坐标移动的问题

src/main/java/com/ossez/codebank/interview/KayakRobotMovement.java

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+package com.ossez.codebank.interview;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * 
+ * @author YuCheng
+ *
+ */
+public class KayakRobotMovement {
+
+	private final static Logger logger = LoggerFactory.getLogger(KayakRobotMovement.class);
+
+	/**
+	 * Get coordinates for Robot Movement
+	 * 
+	 * @param data
+	 * @return
+	 */
+	public static String getCoordinates(String data) {
+		logger.debug("BEGIN");
+
+		String retStr = "";
+
+		int x = 0;
+		int y = 0;
+		int[][] move = { { 0, 1 }, { 1, 0 }, { 0, -1 }, { -1, 0 } };
+		int dir = 0;
+
+		for (char ch : data.toCharArray()) {
+			if (ch == 'F') {
+				x += move[dir][0];
+				y += move[dir][1];
+			} else if (ch == 'L') {
+				dir--;
+			} else if (ch == 'R') {
+				dir++;
+			}
+			dir = (dir + 4) % 4;
+		}
+		retStr = x + "," + y;
+
+		return retStr;
+	}
+}