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Create a parameterized constructor


Create a parameterized constructor

By : Adam Fisher
Date : October 16 2020, 03:08 PM
it should still fix some issue Default constructor doesn't take any argument. Your second constructor is a parameterized constructors. And your code is okay you just need to create one more parametrized copy constructor which takes another instance as argument. i.e
code :
 public CheeseCake (CheeseCake ck)
    {

    Cheese = ck.getCheese();
    StrawBerry = ck.getStrawBerry();
    Cream = ck.getCream();

    }


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Can we create a non parameterized constructor in servlet?

Can we create a non parameterized constructor in servlet?


By : user3723353
Date : March 29 2020, 07:55 AM
hop of those help? You are correct with your guess. DemoServlet() would be called by the container and any initialization code within it would be executed - even if that initialization is done through constructor-chaining And as a matter of fact this is a good way to have dependency injection and create a thread-safe servlet which is testable Typically it would be written this way
code :
public class DemoServlet extends HttpServlet
{
   private final someParam; //someParam is final once set cannot be changed

   //default constructor called by the runtime.
   public DemoServlet()
   {
       //constructor-chained to the paramaterized constructor
       this(1);
   }

   //observe carefully that this paramaterized constructor has only
  //package-level visibility. This is useful for being invoked through your
  //  unit and functional tests which would typically reside within the same 
  //package. Would also allow your test code to inject required values to 
 //verify behavior while testing.
   DemoServlet(int someParam)
   {
      this.param = param
   }

   //... Other class code...
}
Can we create a component with parameterized constructor?

Can we create a component with parameterized constructor?


By : user3737879
Date : March 29 2020, 07:55 AM
Hope this helps we can create parameterized constructor in ATG and you can achive this as follows.
code :
package mycompany;
public class MyClass {
    private String mystring;
    private int mynumber;

    // The constructor requires two arguments.
    public MyClass (String pMyString, int pMyNumber) {
        mystring = pMyString;
        mynumber = pMyNumber;
    }

    public String getmMyString() {
        return mystring;
    }
    public int getmMyNumber() {
        return mynumber;
    }
}
$class=mycompany.MyClass
$instanceFactory=/atg/dynamo/nucleus/ParameterConstructorInstanceFactory
$constructor.param[0].value=Hello
$constructor.param[0].type=String
$constructor.param[1].value=321
$constructor.param[1].type=int
Why is it mandatory to call a Super class's parameterized constructor inside subclass's parameterized constructor in jav

Why is it mandatory to call a Super class's parameterized constructor inside subclass's parameterized constructor in jav


By : siux
Date : March 29 2020, 07:55 AM
should help you out A constructor that doesn't have an explicit call to a super class constructor will be added an implicit call to the parameterless constructor (as if the super(); statement was added a its first statement).
In your case, since the super class has a constructor with parameters, it has no parameterless constructor, so super(); can't pass compilation, and you must call super(text) explicitly.
What happens when we create a parameterized constructor with a pointer arguement?

What happens when we create a parameterized constructor with a pointer arguement?


By : Vjokh
Date : March 29 2020, 07:55 AM
like below fixes the issue This goes back to older style C habits, when you can use a pointer as an array, by "indexing" it's elements.
Taken from: https://en.wikibooks.org/wiki/C_Programming/Pointers_and_arrays
why cannot we create spy for Parameterized Constructor using Mockito

why cannot we create spy for Parameterized Constructor using Mockito


By : jonathan gonzalez
Date : March 29 2020, 07:55 AM
Any of those help You can do that by instantiating your main class with parametrized constructor in your junit and then creating a spy from it.
Let's suppose your main class is A. Where B and C are its dependencies
code :
public class A {

    private B b;

    private C c;

    public A(B b,C c)
    {
        this.b=b;
        this.c=c;
    }

    void method() {
        System.out.println("A's method called");
        b.method();
        c.method();
        System.out.println(method2());

    }

    protected int method2() {
        return 10;
    }
}
@RunWith(MockitoJUnitRunner.class)
public class ATest {

    A a;

    @Mock
    B b;

    @Mock
    C c;

    @Test
    public void test() {
        a=new A(b, c);
        A spyA=Mockito.spy(a);

        doReturn(20).when(spyA).method2();

        spyA.method();
    }
}
A's method called
20
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