7段階目（IDが一致するか調べるメソッドを作ろう）

em-oop/src/EmployeeData.java

@@ -35,6 +35,19 @@ public class EmployeeData {
 				+ "\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;
 	}
@@ -98,4 +111,5 @@ public class EmployeeData {
 		}
 		return true;
 	}
+
 }