Understanding Java Collection Framework

Thought of sharing my understanding about utilizing java collection classes , so here is the post

History : Vector & HashTable are introduced very first in JDK 1.0 and then complete collection framework is introduced in JDK 1.2. You can see complete hierarchy of collection framework here. Here i am going to explain their uses in short

image 

image

image

Comments

  1. AnonymousJune 10, 2010 at 2:42 AM

    Very nice article.

    ReplyDelete
  2. rajeshJune 10, 2010 at 3:28 AM

    very helpful

    ReplyDelete
  3. Neil GhoshJune 14, 2010 at 12:26 AM

    Thanks for the post

    ReplyDelete
  4. LindaJune 20, 2011 at 6:19 AM

    Nice stuff, I was asked about collections framework in an interview today. I need to learn how to use them.

    Nice post
    Helen Neely

    ReplyDelete
  5. NilimaSeptember 4, 2011 at 11:16 PM

    it would be helpful if someone can explain with an example that how can we use them.

    ReplyDelete
  6. Yogesh DevatrajSeptember 4, 2011 at 11:19 PM

    @Nilima Just google for it you will get enough examples for each of above classes.

    ReplyDelete
  7. UnknownJuly 18, 2016 at 6:09 AM

    super

    ReplyDelete

Post a Comment

Popular posts from this blog

State Design Pattern by Example

Image
State pattern falls under the category of Behavioral patterns. State design pattern comes in picture when a system’s behavior is depends on its own state or some other resource’s state. If an implementation is depends on the states, we end up with snarl of conditional statement every where in code. A very neat approach to deal with such situation is to separate out every state’s behavior and use them where ever they are applicable. The state pattern allows an object to alter its behavior when is internal state changes . The object is appeared to change its class. State pattern is a way to implement the same. Class Diagram : As above class diagram shows, System class holds state instance. As state of system changes , all handle request delegated to respective State’s concrete implementation. Example : Have an example of Vending machine. Vending machine has following states No Coin Inserted Coin Inserted Dispensing Empty Following diagram explain behavior
Read more

Eclipse command framework core expression: Property tester

Image
Addition to Eclipse command framework series, this post explains use of property tester to control command’s enable/visible properties. In earlier post we have tried declarative way to achieve same thing but property tester gives us more control. Property tester is associated with, tester class which implements PropertyTester.java, a namespace and set of property which it supports. We can refer this property tester using its namespace + a property name. It gives you call back to test() method with property name as parameter inside property tester class. We can configure property tester for type of input parameter. Here is sample declaration of property tester extension point < extension point ="org.eclipse.core.expressions.propertyTesters" > < propertyTester class ="com.example.advance.cmd.EditorTester" id ="com.example.advance.cmd.propertyTester1" namespace ="com.example.advance.cm
Read more

Composite Design Pattern by example

Image
This post explains Composite design pattern with an example. When to use ? – Use Composite pattern when you have treat a collection of objects as they were once one thing. With Composite design pattern it is very easy to simplify operations over collection data structure. It reduces complexity of the code required if you were going to handle collection as special case. How to Use? - The Composite pattern consist of Component, Leaf and Composite Classes as shown below class diagram Component – Component declares the common interface that both the single and composite nodes will implements Leaf – The leaf class represent the singular atomic data type implementing he component interface.     Composite – Composite is an abstract entity which declares common functionality which are needed by concrete implementation for handling collection data. An Example -   Item.java public interface Item {     public double getPrice(); }   ColdDrink.java pu
Read more