5段階目（Mainでポリモーフィズムを使おう）

em-oop/src/EmployeeData.java

@@ -35,19 +35,6 @@ public class EmployeeData extends BaseData {
 				+ "\t" + this.password + "\t" + this.idDepartment;
 	}
 
-	public boolean isMatchId(String id) {
-		return getIdEmployee().equals(id);
-	}
-
-	public static boolean isMatchId(EmployeeData[] employees, String id) {
-		for (EmployeeData e : employees) {
-			if (e.isMatchId(id))
-				return true;
-
-		}
-		return false;
-	}
-
 	public String getIdEmployee() {
 		return idEmployee;
 	}
@@ -122,5 +109,4 @@ public class EmployeeData extends BaseData {
 	public String getPrimaryKeyValue() {
 		return this.idEmployee;
 	}
-
 }