Databases
StackOverflow2013
Postsdbo
POmodeling a real world problem into java classes
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POmodeling a real world problem into java classes
    primarykey
    data
    text
    <p>How can i model foollwing problem statatement into java classe?</p> <p>I have a class vehincle.</p> <ul> <li>Vehicles can be of type Trucks, Cars, Scooters, motorcycles.</li> <li>Vehicle has a engine.</li> <li>engine shold have following contraints <ul> <li>Petrol Engine and Diesel Engine are types of Engines</li> <li>Truck comes with 4 stroke, 12 cylinder Diesel Engine</li> <li>Car can have either 4 stroke Petrol Engine or 4 stroke Diesel Engine</li> <li>Car can have either 4 Cylinder Engine or 6 Cylinder Engine.</li> <li>Motorcycle can have 4 stroke single Cylinder Petrol Engine or 4 stroke twin-cylinder Petrol engine.</li> <li>Scooters can have Single Cylinder 2 Stroke Petrol Engine or Single Cylinder 4 stroke Petrol Engine.</li> </ul></li> <li>Each engine consists of <ul> <li>Number of cylinders [1/2/4/6/12 only]</li> <li>Number of strokes [2/4 only].</li> <li>‘Engine Number’ is always 6 characters alphanumeric.</li> </ul></li> <li>Diesel engine always comes with 4 strokes but Petrol engine can come with either 2 strokes or 4 strokes.</li> <li>Only Petrol engines have Spark plugs [One per cylinder]. Diesel Engine cannot have Spark plugs.</li> <li>Sparkplug just has sequence number [e.g Car with 6 Cylinder Engine will have Sparkplugs SP1, SP2, SP3, SP4, SP5, SP6]</li> <li>Only Trucks and Cars have Oil Pump. </li> <li>Each Oil pump has <ul> <li>Identification number 6 char alphanumeric</li> <li>Capacity in cubic centimeters(cc) per seconds [value can be between 1-5]</li> </ul></li> </ul>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USJoey
    1. USakshay
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POmodeling a real world problem into java classes
      1. This table or related slice is empty.
      1. VTUpMod
    1. COis that homework?
      singulars
      1. POmodeling a real world problem into java classes
      1. USBozho
    2. COWhat exactly is the problem here? The specifications you have fit perfectly into a class hierarchy.
      singulars
      1. POmodeling a real world problem into java classes
      1. USChinmay Kanchi
    3. COam not getting how should i model it into java classes
      singulars
      1. POmodeling a real world problem into java classes
      1. USakshay
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload