How to sort a vector elements that contains the user define class object? (Note: If Suppose consider, A Student class contain two data members. They are String studentName and int rollNo. I am creating Four objects for this class, each object contains students details like name and roll no. Now i am storing that objects in vector and if i retiving the elements from the vector means then it should be display in sorting order)

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How hashmap works in java?

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What is the reason that multiple inheritance is not possible in java??

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Is there any case when finally will not be executed?

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Why operator overloading is not in Java?

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WHAT IS THE SCOPE FOR COREJAVA...? IS JAVA ONLY CORE JAVA ?

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What is difference between Iterator and for loop

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Is java pass by value or pass by reference?

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Say you want to store the information about a number of pets in an array. Typical information that you could store for each pet (where relevant) would be • Breed of animal • Animal's name • Its birth date • Its sex • Whether it has been sterilised or not • When it is due for its next inoculation • When it last had its wings clipped For each type of pet (eg. dog, cat or bird) you would typically define a class to hold the relevant data. Note: You do not need to implement these classes. Just answer the following questions. 3.1.1 What would be the advantage of creating a superclass (eg. Pet) and declaring an array of Pet objects over simply using an array of Objects, storing each of the instances of the different pet classes (eg. Dog, Cat or Bird) in it? 3.1.2 Would you define Pet as a class or as an interface? Why? (2) (2)

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Are arrays static in java?

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What is the use of static keyword in "public static void main()"

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What are the characteristics of Final,Finally and Finalize keywords.

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