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Take 2 classes.i.e., Class A,Class B. In Class B declare constructor as Private.But I have to access Class A using the constructor in Class B. How is it possible?One interviewer told that Through getInstance() method it's possible to access Class A.e Even Class B declare as Private. How is it possible? Explain with an example.
Suneet Jain
- Nov 20th, 2006
class A { public static void main(String[] as) { B b = B.getInstance(); // get the instance of Class B and store it in variable b ...
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}
}
">Hi, all where we will use this scenario like an abstract class with out abstract methods may i know what is the use of this class?when ur not creating the object and not implementing any of the methodpublic abstract class DemoAbstract { public static void main(String args[]) { System.out.println("inside main"); } }
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How can you invoke parameterized constructor to create object from class reference?
utpal_utkalit
- Nov 16th, 2006
Here is the snap shot of the working solution to the said question..try{System.out.println("class name is "+class_name);Class cls=Class.forName(class_name);Constructor[] ctorlist=cls.getConstruc...
utpal utkalit
- Nov 15th, 2006
I mean,how would you construct object thru virtual constructor...
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else if (month==3||month==4||month==5)
season = "spring";
else if (month==6||month==7||month==8)
season = "summer";
else if (month==9||month==10||month==11)
season = "autumn";
else
season = "bogus month";
System.out.println(season);
}
}">Although the output of following is spring, but how can we use the command line argument for the same program? pls solve thisthanks in advanceclass Ifelse{public static void main(String arr[]){int month=4;String season;if (month==12||month==1||month==2)season = "winter";else if (month==3||month==4||month==5)season = "spring";else if (month==6||month==7||month==8)season = "summer";else if (month==9||month==10||month==11)season = "autumn";elseseason = "bogus month";System.out.println(season);}}
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How can we connect to a database without using connection class?
Srikanth Rao
- Nov 13th, 2006
using DataSources We can Connect to DataBase
srinivasaraobora
- Oct 15th, 2006
Hi,I think it is possible by Hibernate (ORM tool).if any one want example code plz send a mail to id.keeps smiling and mailingbora_srinivasarao@yahoo.co.incell:+919989190898"HELP EVER HURT NEVER"&...
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Can a reference variable of an interfece holds the address of an object of a class that implements that interfaceExampleclass X implements Y{ //Method Implementations of Interface public static void main(String args[]) { Y y=new X(); }}
Radhakrishna
- Nov 9th, 2006
yes reference variable of interface type can hold the address of the object of a class which implements that interface but we can call the only those methods which are declared in that interface...
Pardhas
- Aug 13th, 2006
Yes. reference variable of an interfece holds the address of an object of a class that implements that interface
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Hiwe have super class constructor and extends subclass which contains subclass constructor we create subclass obj only what’s result & what happens
Radhakrishna
- Nov 9th, 2006
hi,By default the first statement of any constructor is the super(); means before excuting the subclass constructor it will call the superclass zeroargument constructor.putting this statem...
meetnaveen4u
- Oct 10th, 2006
Hi,I think the question is wrong. When we extend the super class then only a class becomes subclass of super class. Please reframe it properly.ThanksNaveen.
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Hi i am new to this community. I am new to struts. I have one question that in struts-config.xml file in the action path we have several parameters. I want to know the significance of each parameter especially of input parameter. is it necessary to mention this paramter, if not specified then what will happen?Thanks in advance.
Radhakrishna
- Nov 9th, 2006
hi, The significance of input attribute for the action tag is:If any FormBean is mapped with that path then the request goes to that FormBean first instead of that action and it will...
hibapi
- Oct 31st, 2006
first you go through a text book on struts or go through some online tutorials on struts...for the first timers on struts.......i suggest the book by Steven Holzner.....sory i have forgotten the bo...
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Java Interview Questions
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