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What is an enumeration class
rschandola
- May 31st, 2007
The enumeration is an Interface, by which we can enumerate( obtain one at a time) the elements in a collection. It has 2 methods: boolean hasMoreElement() Object nextElement()
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What is the default layout of the panel and frame
rschandola
- May 31st, 2007
FlowLayout is the default layout for Panel.BorderLayout is the default layout for Frame.
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Which of the following are correct?
A) 128 >> 1 gives 64B) 128 >>> 1 gives 64C) 128 >> 1 gives -64D) 128 >>> 1 gives -64
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What is meant by cookies ? Explain
Radhakrishna Billa
- May 7th, 2007
Cookies are the one mechanism of Session Tracking means knowing about?from which user request is coming.?In this mechanism details of the user to recognize him is maintaining at the client side only...
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How do you achieve multiple inheritance in Java?
A) Using interfaces.B) Using abstract classesC) Using final classesD) None of the above
letcshail
- Apr 26th, 2007
In java multiple inheritance is not allowed(but allowed in C++).In java you can have at most? one direct base class. A base class can have many subclass.
waswani
- Dec 23rd, 2005
Through interfaces...as java multiple inheritance through classes is not supportd in java
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What are statements in JAVA
Satyanarayana CH
- Sep 19th, 2005
There are 3 types of statements 1.Statement 2.Prepared Statement 3.Callable statement.
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How does a try statement determine which catch clause should be used to handle anexception
When an exception is thrown within the body of a try statement, the catch clauses of thetry statement are examined in the order in which they appear. The first catch clause that iscapable of handling the exception is executed. The remaining catch clauses are ignored.
RKalaa
- Apr 26th, 2007
If you are trying to catch the specific exception , write that catch clause prior to the other / general clauses.Otherwise the compilation error "The Exception already been caugh...
prabhakar
- Feb 28th, 2006
now once the exception is thrown the jvm searches for the catch blocks from the most specific type to the general one in order i.e from the subclasse then to the super class for all exception.so...
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What is casting
There are two types of casting, casting between primitive numeric types and castingbetween object references. Casting between numeric types is used to convert largervalues, such as double values, to smaller values, such as byte values. Casting betweenobject references is used to refer to an object by a compatible class, interface, or arraytype reference.
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How are the elements of a GridLayout organized
The elements of a GridBad layout are of equal size and are laid out using the squares of agrid.
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Parent p = new Parent(); // Can we access x using the p reference?
System.out.println("X in parent is " + p.x); // Compiler error!
}
}
when i compile this code it dosen't give any error.even though both classes are in diffrent package.
but in pdf it mentioned that it gives an error because you are trying to access the protected variable
using the instance of the super class
if the above code is write then what is logic behind the protected member of super class and if sub class
in different package try to access the member of the super class.">Hi,I am preparing for sjcp exam.my quetion is about the protected class. it have one super and sub class example ,below example i read from one pdf.package certification;public class Parent { protected int x = 9; // protected access}----------------------------package other;import certification.Parent;class Child extends Parent {public void testIt() { System.out.println("x is " + x); // No problem; Child inherits x Parent p = new Parent(); // Can we access x using the p reference? System.out.println("X in parent is " + p.x); // Compiler error!}}when i compile this code it dosen't give any error.even though both classes are in diffrent package. but in pdf it mentioned that it gives an error because you are trying to access the protected variableusing the instance of the super class if the above code is write then what is logic behind the protected member of super class and if sub classin different package try to access the member of the super class.
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Java Interview Questions
Ans