Interested to Buy Any Domain ? << Click Here >> for more details...
What is the use of collections in java? How it is
implemented in real time applications?
- 2 Answers
- 12444 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / srikanth reddy
they are used to store elements in java like arrays
ArrayList al=new ArrayList();
al.add("sri");
al.add(new Integer(99);
| Is This Answer Correct ? | 7 Yes | 7 No |
Answer / pradip mishra(b-tech it)
interfaces, implementations, and algorithms — that comprise
the Java Collections Framework.
General-purpose implementations are the most commonly used
implementations, designed for everyday use. They are
summarized in the table below.
Special-purpose implementations are designed for use in
special situations and display nonstandard performance
characteristics, usage restrictions, or behavior.
Concurrent implementations are designed to support high
concurrency, typically at the expense of single-threaded
performance. These implementations are part of the
java.util.concurrent package.
Wrapper implementations are used in combination with other
types of implementations, often the general-purpose ones,
to provide added or restricted functionality.
Convenience implementations are mini-implementations,
typically made available via static factory methods, that
provide convenient, efficient alternatives to general-
purpose implementations for special collections (for
example, singleton sets).
Abstract implementations are skeletal implementations that
facilitate the construction of custom implementations —
described later in the Custom Collection Implementations
section. An advanced topic, it's not particularly
difficult, but relatively few people will need to do it.
| Is This Answer Correct ? | 2 Yes | 6 No |
What does system out println () do?
What are the different types of sorting in java?
What will happen inside init() in servlet. my interviewer asked servlet lifecycle. i said "once servlet is loaded in to memory init() will be called which performs servlet initialization " . Again interview asked what values will be initialized . what is difference between init() and init(ServletConfig config).
2 Answers Infinite Computer Solutions, TCS,
How is Object Oriented Programming different from Procedure Oriented Programming?
How do you create a bulleted list?
What are filterstreams?
Explain wait() method of object class ?
Can we sort hashset in java?
class{ ... ... interface myinterface{ ... ... } abstract class{ .. .. } ... .. .. } is this possible to write "Interface and/ or Abstract class inside a class ? if possible whcich one is possible is only interface? is only abstract?
Why is method overloading not possible by changing the return type in java?
What do you know about the garbage collector?
What is the use of keywords in java?
Core Java 
