曜日を表すenum作成

model/src/main/java/one/nem/kidshift/model/enums/WeekdayEnum.java

@@ -0,0 +1,40 @@
+package one.nem.kidshift.model.enums;
+
+public enum WeekdayEnum {
+
+    MONDAY("月曜日"),
+    TUESDAY("火曜日"),
+    WEDNESDAY("水曜日"),
+    THURSDAY("木曜日"),
+    FRIDAY("金曜日"),
+    SATURDAY("土曜日"),
+    SUNDAY("日曜日");
+
+    private final String displayName;
+
+    private WeekdayEnum(String displayName) {
+        this.displayName = displayName;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public static WeekdayEnum fromDisplayName(String displayName) {
+        for (WeekdayEnum value : WeekdayEnum.values()) {
+            if (value.getDisplayName().equals(displayName)) {
+                return value;
+            }
+        }
+        return null;
+    }
+
+    public static WeekdayEnum fromOrdinal(int ordinal) {
+        for (WeekdayEnum value : WeekdayEnum.values()) {
+            if (value.ordinal() == ordinal) {
+                return value;
+            }
+        }
+        return null;
+    }
+}