지하철 등록 techeer-sv#7 refactor : SubwayUtils 구현

src/main/java/subway/config/SubwayInitializer.java

@@ -1,6 +1,7 @@
 package subway.config;
 
 import subway.service.SubwayService;
+import subway.util.SubwayUtils;
 
 public class SubwayInitializer {
     private final SubwayService subwayService;
@@ -15,19 +16,18 @@ public void initialize() {
     }
 
     private void initializeStations() {
-        subwayService.addStation("교대역");
-        subwayService.addStation("강남역");
-        subwayService.addStation("역삼역");
-        subwayService.addStation("남부터미널역");
-        subwayService.addStation("양재역");
-        subwayService.addStation("양재시민의숲역");
-        subwayService.addStation("매봉역");
+        SubwayUtils.addStations(subwayService,
+                "교대역", "강남역", "역삼역",
+                "남부터미널역", "양재역", "양재시민의숲역", "매봉역"
+        );
     }
 
     private void initializeLines() {
-        subwayService.addLine("2호선", new String[]{"교대역", "강남역", "역삼역"});
-        subwayService.addLine("3호선", new String[]{"교대역", "남부터미널역", "양재역", "매봉역"});
-        subwayService.addLine("신분당선", new String[]{"강남역", "양재역", "양재시민의숲역"});
+        SubwayUtils.addLines(subwayService, new Object[][]{
+                {"2호선", new String[]{"교대역", "강남역", "역삼역"}},
+                {"3호선", new String[]{"교대역", "남부터미널역", "양재역", "매봉역"}},
+                {"신분당선", new String[]{"강남역", "양재역", "양재시민의숲역"}}
+        });
     }
 
 }

src/main/java/subway/util/SubwayUtils.java

@@ -0,0 +1,20 @@
+package subway.util;
+
+import subway.service.SubwayService;
+
+public class SubwayUtils {
+
+    public static void addStations(SubwayService subwayService, String... stations) {
+        for (String station : stations) {
+            subwayService.addStation(station);
+        }
+    }
+
+    public static void addLines(SubwayService subwayService, Object[][] lines) {
+        for (Object[] line : lines) {
+            String lineName = (String) line[0];
+            String[] stations = (String[]) line[1];
+            subwayService.addLine(lineName, stations);
+        }
+    }
+}