How to create stored procedure in Oracle
What is a stored procedure ? A stored procedure is a PL/SQL block which performs a specific task or a set of tasks. A procedure has a name, contains SQL…
Observer Design Pattern in java / How to implement Observer design pattern in java
What is Observer Pattern ? Suppose there are a set of objects of one type watching an object of another type such that whenever there is change in the watched…
Access specifiers in java / Everything about protected access specifier in java
Meaning of access specifiers Access specifiers control the visibility of components of a class outside that class. That is, access specifiers decide that from where a component can be easily…
Meaning of public static void main in java / Understanding main method in java / Everything about main in java
Main method : Overview Anyone who is familiar with java must be knowing main method. Whenever a class is executed using java command(or through an IDE), it is this method…
How to create a mirror image of a 2d array in java / How to create mirror image matrix in java / How to flip an array from left to right in java
Meaning Mirror image of a 2d array is another array whose columns are interchanged, meaning elements of first column become the elements of last column, elements of second column become…
How to create immutable class in java / What are immutable classes in java
Immutable object : Meaning Literal meaning of the word immutable is "not changing", "unable to be changed". When relating this word to a java object, it means an object whose…
Difference between :last and :last-child selector in jQuery / :last Vs :last-child selector in jQuery
:last Selector - Meaning and Usage :last selector fetches the last element from the collection of elements matched using a selector. Example, $("span") will select all span elements on the…
Use of @Override annotation in java / How to use @Override annotation in java / Why should you use @Override annotation
Meaning of @Override annotation @Override annotation is used over methods defined in a class. When this annotation is written over a method, then this method : Might be declared in…
How to perform an action before terminating a java application / How to use shutdown hook in java
Scenario Suppose your application starts a process (a server embedded in the application, let's say). The application may be running from a command line interface or a GUI. Now, you…