What is JSON? JSON stands for JavaScript Object Notation and has become the most popular format for transfer and storage of data since due to its light weight nature. Data…
Many times it happens that a file already exists with some contents and you need to add(or append) some text to it. Fortunately java provides many methods using which text…
What is a prime number? A prime number is a number that is completely divisible by only 1 and itself. By completely divisible means that when divided by a number,…
Cloning an object means creating its exact copy. Cloned object would have the same properties and methods as the source object. There are different ways of creating a clone of…
Requirement Knowing the current selected database becomes very important when there are more than one databases created and you want to know on which database your queries were executed or…
What is an Array? An array is a group of elements of similar data type. Array elements can be either primitives(such as int, float, double) or objects(such as String, Person,…
An array is an object in java. If you try to print it by simply supplying it to System.out.print statement, is is printed as just like any other object. Example,…
A list in python is a collection of elements of same or different types and is created by enclosing the elements inside square brackets. Often you need to make a…
java.lang.NullPointerException is the most commonly encountered exceptions while execution of applications written in java. All java programmers are haunted by this exception since it mostly arises due to incorrect handling…