JAVA clone() copy object to other class objects

Question

I want to ask you how can i copy firstClass objects to secondClass objects?

Is this possible to figure it out by using clone()?

The situation looks like this:

I have a class f.x. firstClass. And I need to clone firstClass objects to secondClass objects (and these cloned objects must be stored into array)

Thanks

EDITED:

sorry for a little information. But my task looks like this:

Write a Garage class whose objects can hold up to some number of Vehicle objects in an array. Make Garage a Cloneable type, and write a proper clone method for it. Write a Garage.main method to test it.

what do firstClass and secondClass look like? does one inherit from another? — Sam I am says Reinstate Monica
– Sam I am says Reinstate Monica, Commented Oct 21, 2013 at 18:26

Ann · Accepted Answer · 2013-10-21 18:29:22Z

3

It's not cloning. If you have two unrelated classes, the best you can do is write a constructor for SecondClass that takes FirstClass object as an argument and writes all the values into the proper fields:

public SecondClass (FirstClass source){
  this.valueA = source.getValueA();
  this.valueB = source.getBValue();
  this.valueC = source.getProperCValue();
  ...
}

answered Oct 21, 2013 at 18:29

Ann

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Basilevs · Accepted Answer · 2013-10-21 18:34:39Z

3

By convention, Object.clone() method and its overrides should always return an object of the original type.

x.clone().getClass() == x.getClass()

So it should be impossible to create an object of different type if clone() is properly implemented and used.

edited Oct 21, 2013 at 18:34

answered Oct 21, 2013 at 18:27

Basilevs

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user2511414 · Accepted Answer · 2013-10-21 18:32:19Z

1

something like this?!

class Foo{
  private String bar;
  public Object clone(){
    Foo f=new Foo();
    f.setBar(this.bar);
    //filling and copy the f attributes
    guys.add(f);
  }
   ///
   private final static List<Foo> guys=new ArrayList<>();
   ///
}

answered Oct 21, 2013 at 18:32

user2511414

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