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Can we use final keyword before constructor?
Is it possible to define final keyword before constructor.if yes then describe?
varanasisaikarthik
- May 1st, 2008
generally, final keyword is used when we want not to override the class, or not to over ride the subclass methods, but Constructor have the methods or datamembers to activated when we instantiaed, so,...
lukeyuan
- Feb 14th, 2008
No, constructor takes only access modifier such as public, protected, private or NONE. Threrefore, constructor can not be abstract, final, native,static, or synchronized.
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Because finalize () belongs to the java.lang.Object class, it is present in all ___.
A) objectsB) classesC) methodsD) interfaces.
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Can try statements be nested
Try statements may be tested.
ashfaq02
- May 1st, 2008
Yes, try statements can be nested . first the inner statements will be executed .
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What exactly happens when Class.forName(sun.jdbc.odbc.JdbcOdbcDriver) gets called
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What will be the return type of the below overloaded methodpublic void example(int x) {a) int b) charc) short
shaik
- Jan 5th, 2007
Overloading never concerns with return type. Even if the method "void example(int x)" is overloaded with different parameters and no. of parameters the return type is same i.e void mean nothing it is returning.
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How can u implement hashmap if u r not having it in java?
santoshbwn
- May 10th, 2008
class container{//put the setters and getters of key and valuesobject key=null; //acting as keyList values=null;public void Container(){key=new Object();values=new ArrayList();}public insert(object ke...
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Which one of the following operations is NOT supported by java.lang.Runtime
Choice 1 Request the garbage collector to be active. Choice 2 Add shutdown hooks. Choice 3 Execute native operating system commands. Choice 4 Dynamically unload Class files. Choice 5 Cause the Java Virtual Machine (JVM) to exit.
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An applet is downloaded on demand
A) TrueB) False
Arnab.infinity
- Mar 19th, 2008
Falsebecuse its the browser which download the applet program over the internet,so it is not up to the user
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What is the unit for 1000 in the below statement?ob.sleep(1000)
A) Int millisecondsB) Double millisecondsC) long millisecondsD) Float milliseconds
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Phantom memory
What is phantom memory and how it is useful?
rajamuthuramans
- May 27th, 2008
A phantom reference lets you do final touch up closing on an object, even after it has been declared dead no longer referenced by any live object.Java has four orders of strength in holding onto O...
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Difference between == and equals()
sanjay637
- May 27th, 2008
The operator == compares the content of two stringsequals method compares the references of two variablesgenerally we use == operator for comparing numbersthankssanjay bandi
jaiho123
- May 13th, 2008
public class Test1{public static void main(String args[]){String s1="ashu";String s2="ashu";if(s1==s2) ...
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How OOPS concept is achieved in Java
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If duplicate value enters into 'set' interface, how it rejects duplicate value?
govindaaa
- May 29th, 2008
If the given object already exists in the set then it will return falseotherwise it returns true indicating success
Puneet
- Aug 25th, 2006
Using the objects equals method
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Is array an object?
amitkumarpadhy
- May 30th, 2008
Class Object is the root of all Class. Every class has Object as a SuperClass . So if array like all other classes are objects.
Gurpreet
- Jun 20th, 2006
Yes array is object.
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Java is a Programming Language.
A) TrueB) False
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State true or false :- Final methods can be overridden.
A) TrueB) False
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What is final method
CalBear
- Jun 2nd, 2008
Method declared as final cannot be overridden but CAN be inherited. Example: The isAlive() method in Thread class is marked final but any subclass of class Thread inherits that method i.e. method isAlive() can be invoked on an instance of the subclass.
mahendra
- Jul 5th, 2005
Method declared as final as 2 uses. 1.method declared as final cannot be overridden. 2.method declared as final cannot be inherited.
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Can an object's finalize() method be invoked while it is reachable
An object's finalize() method cannot be invoked by the garbage collector while the objectis still reachable. However, an object's finalize() method may be invoked by otherobjects.
rin.amaru
- Jun 5th, 2008
No , because finalize() method is being invoked just before the garbage collection and an object can not be garbage collected unless there is any live reference of that object i.e that object is reachable.
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A method is overridden if there is a method in the subclass that has the same name and the ________ set of parameters.
Skill/Topic: InheritanceA) SameB) DifferentC) MixedD) None of the above
Karuna Reddy
- Jun 6th, 2008
same parameteroverriden: super class, method declared as private than sub class method can't be overriden.super class method declared as defalut ie emepty than subclass method should be the same o...
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Which of the following are primitive types?
A) byteB) StringC) integerD) float
Java Interview Questions
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