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Memory Allocation
What is the difference between below 2 statements? String s1=new String("abc");String s2="abc";How it will allocate in memory?
gaurav
- Jun 15th, 2012
in String s1 = "Hello World"; // "Hello world" is a constant and it will be allocated in the string pool. all the variables refering to "Hello World" constant will refer to same memory location in th...
sampra
- Mar 13th, 2012
String s1=new String("abc");- creates 2 obj one in jvm and one in pool.
String s2="abc"; no obj will create it will point to pool above already created existing obj -
Primitive Types
What happens when you add a primitive type (e.g. double) value to a collection?
pdureja
- Apr 6th, 2011
Collection can hold Objects but not primitives. Prior to Java5, we need to wrap primitive using wrapper classes and in java 5 autoboxing do it automatically.Prior to java 5:xyzCollection.add(new Integer(10))In javaxyzCollection.add(10) //will do autoboxing
mani.sivapuram
- Mar 11th, 2011
Every one says that every concept in Java is purely prepared in Object Oriented Form only in you need to remember one thing when Java people preparing the Java they try to create an alter native t...
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Dependency injection
What is dependency injection ?
lwpro2
- Mar 8th, 2011
Spring terms of Inversion of Control is called dependency injection.Instead of creating dependency class B instances from Object A (A--> B), dependency injection is the design pattern suggesting the r...
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What is ACID
Answered by Jey on 2005-05-08 17:27:45: ACID is releated to transactions. It is an acronyam of Atomic, Consistent, Isolation and Durable. Transaction must following the above four properties to be a better one Atomic: It means a transaction must execute all or nothing at all. Consistent: Consistency is a transactional characteristic that must be enforced by both the transactional system...
opbehera
- Feb 8th, 2010
A - AtomocityC - ConsistencyI - IsolationD - Durability.When Transactoon(Tx) middleware service is enabled on the Businesslogic the data on the application available outside or in DB s/w&nbs...
Ritesh patni
- Jul 25th, 2005
Atomic-- should execute all or nothing...rollback come into picture Consistent--Consistency is a transactional characteristic that must be enforced by both the transactional system and the applic...
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What is EJB
opbehera
- Feb 8th, 2010
EJB is a distributed technology i.e capable of developing java based distributed applications, enterprise application & heavy weight business component giving the advantages of readyma...
sai.pappu
- Sep 26th, 2008
EJB is an server side component & its a WODA ( Write Once Deploy Any Where).EJB's run will under the control of EJB container.EJB is popular due to System level services provided by it.Developer can more concentrate on Business Logic due to services provided byu EJB.thanks.
