Conditional Branch

Data.java

class Data {

     public String format(List<String> datas) {
        StringBuilder result = new StringBuilder();
        boolean first = true;
        for(String data : datas) {
            if(first) {
               first = false;
            } else {
               result.append(", ");
            }
            result.append(data);
        }
        return result.toString();
     }
   
}

Employee.java

class Employee {
  private int _type;
  static final int ENGINEER = 0;
  static final int SALESMAN = 1;
  static final int MANAGER = 2;
 
  Employee (int type) {
    _type = type;
  }
 
  int payAmount() {
    switch (_type) {
      case ENGINEER:
        return _monthlySalary;
      case SALESMAN:
        return _monthlySalary + _commission;
      case MANAGER:
        return _monthlySalary + _bonus;
      default:
        throw new RuntimeException("Incorrect Employee");
    }
  }
}

Example2.java

class Example2 {
 
    public void create(boolean flag) {
        if(flag) {
          //TODO
        } else {
          //TODO
        }
    }
 
}

UserDAO.java

class UserDAO {

    public void create() {
        if( data not found ) {
            throw new DataNotFoundException();
        }
    }

}

UserService.java

class UserService {

    public void createNewUser() {
        User user = userDao.create();
        if(user != null) {
        }
    }

}