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Calling constructor from another constructor Problem

Mohit G Gupta
Ranch Hand

Joined: May 18, 2010
Posts: 634

self made




Kathy sierra pg134 last point ch-object orientation
the only way a constructor can be invoked is from within the another constructor

getting error:cannot find symbol max()

HOw this possible??


OCPJP 6.0 93%
OCPJWCD 5.0 98%
Minhaj Mehmood
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Joined: Jan 22, 2007
Posts: 400

You're calling constructor max() without new keyword, change the code at like 9 as:



SCJP6 96% | SCWCD5 81% | SCDJWS5 79%
Seetharaman Venkatasamy
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Joined: Jan 28, 2008
Posts: 5575

Constructor is a special kind of method. i.e, Constructor is not a method.



to invoke same class constructor use this()/ this used to invoke overloaded constructor . i.e,
Prasad Kharkar
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Joined: Mar 07, 2010
Posts: 446
    
    1

also I want to add some points..

  • We can call other constuctors by using overloaded verions of this
  • the first line in the construction should be implicit call to the super constructor or call to overloaded constructor using this
  • super() and this() cannot be between lines of code in constructor


  • SCJP 6 [86%], OCPWCD [84%], OCEJPAD [83%]
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    Shanky Sohar
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    Joined: Mar 17, 2010
    Posts: 1051

    Contructor cannot be called by their name as it already mentioned
    best way to call the overloaded constructor is through "this" keyword..


    SCJP6.0,My blog Ranchers from Delhi
    Mohd Abrar Khan
    Greenhorn

    Joined: Jan 20, 2010
    Posts: 18

    "This" is a keyword to refer current object properties and its location

    we can use it in two Cases
    1) To differentiate method and class Attributes

    2) To execute other constructor explicit statements.

    for your example it is to execute the no-arg constructor, hope i am correct.

    Thanks!
    Abrar
     
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