9段階目（チェックをもう1つの項目にも広げ、コンストラクタと統一しよう）

em-oop/src/EmployeeData.java

@@ -40,6 +40,8 @@ public class EmployeeData {
 	}
 
 	public void setIdEmployee(String idEmployee) {
+		if (!check(idEmployee, "社員ID"))
+			return;
 		this.idEmployee = idEmployee;
 	}
 
@@ -48,10 +50,8 @@ public class EmployeeData {
 	}
 
 	public void setNmEmployee(String nmEmployee) {
-		if (nmEmployee == null || nmEmployee.strip().length() == 0) {
-			System.out.println("社員名が空のため設定できませんでした");
+		if (!check(nmEmployee, "社員名"))
 			return;
-		}
 		this.nmEmployee = nmEmployee;
 	}
 
@@ -90,4 +90,12 @@ public class EmployeeData {
 	public static int getEmpCount() {
 		return empCount;
 	}
+
+	private boolean check(String str, String stringName) {
+		if (str == null || str.strip().length() == 0) {
+			System.out.println(stringName + "が空のため設定できませんでした");
+			return false;
+		}
+		return true;
+	}
 }

em-oop/src/Main.java

@@ -65,6 +65,11 @@ public class Main {
 		emp.setNmEmployee("  　　");
 		System.out.println(emp);
 
+		System.out.println();
+
+		EmployeeData emptyEmployee = new EmployeeData("", "", "", "", "", "");
+		System.out.println(emptyEmployee);
+
 	}
 
 }