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How can I swap two variables without using a third variable?Can u plz tell me the logic behind it..?
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I want to create two instances of a class ,But when trying for creating third instance it should not allow me to create . what i have to do for making this?
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How can u move/drag a component placed in Swing Container?
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How can u move/drag a component placed in Swing Container?
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What is the purpose of interface? And tell the difference between the class and interface?
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What is the difference between Enumeration and Iterator?. When i can use Enumeration and when i can use iterator?. Can any one tell me the situation that only Enumeration could able to solve that problem and vice versa.
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I need some more information about interface. For Example there is no any functionality inside the method which is declared in any interface. Then why i want to implement that interface to my class.
2. Statement is an interface. When i say stmt.executeQuery(). I am getting the records in my ResultSet. How it is possible?.. since there is no functionality insid the methods which is declared in Statement Interface. What is happning here?
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what is the difference between putting a class as abstract or if any of method in class is declared as abstract diference of these two while extending these two types of classes
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How We Can We write our own exceptions?
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How We Can We write our own exceptions?
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How u can implement hashmap if u r not having in JAVA?
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What is mutable and immutable in Strings?
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How many ways do we have to load a class
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Why should i use ejb as i can do it in servlet?
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How to compare Stringbuffer objects?
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How i can validate the user, Is there any java api is there for that. Or i can use my one business logic. If both are possible, Then which one is the best way for real time.
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Like Object class is inherited by every class, means every class that you define in java is implicitely extending one class that is Object. Similarly i want to know that which interface is implicitely implemented by every class that we define. let me know as soon as possible.
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How can we emplement strutsframework using jsp or servlets. Tellme.
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How many threads will be created for a java program, when it is compail & run? and what are they?
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What is the difference between Model Data and Default Model Data
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