8633 0
Fibonacci series program in Java (With and without recursion)
In this article, I will explain about what is Fibonacci and how to code Fibonacci series program in java with various ways using recursion and without it.
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161 1
What is Eclipse Comment shortcut?

I am new to java programming and Eclipse, so I would like to know how can I comment or uncomment Java and HTML Code shortcut in Eclipse IDE using Keyboard shortcuts, easily and quickly.

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4851 0
How to compare Strings in Java?
This article explains how can we compare string in Java and give brief insights with an example about various string functions in Java programming language.
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26514 2
Pyramid Triangle pattern programs in Java with explanation
This article gives you code to print different types of pyramids in Java and number pattern programs in java, also explains the code, which helps you clear you concepts of loops in java.
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4345 0
Program to remove duplicate elements in an array in Java
In this article, I have provided various working code solutions to remove duplicate elements from an array in Java
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151 0
Declare and initialize Array in java
In this article, I have mentioned, how we can declare and initialize array in Java with working example code.
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5776 0
Leap year program in Java (multiple ways)
In this article, I will provide you code to create leap year program in java in various possible ways with code explanation.
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354 1
Why did we remove multiple document types within an index in ElasticSearch?

The answer is this-: Because we can't declare a field of different data types within a same index in different document types.

Say there's an index called "college".

Then there are document types called "student" "teacher" "administration" "staff".

What problem would occur if we allow this? 

Books and documentations are saying that if a field called "date_of_join" is given a "text" data type in "student", then we can't give "date_of_join" as "date" data type in "staff".

It says that it's due to the way Lucene is.

This is because of the way Lucene maintains the field types in an index. As Lucene manages fields on an index level, there is no flexibility to declare two fields of different data types in the same index

But this is not clear without an example(of how lucene is storing index). Can you guys clarify this? 

I know that lucene stores inverted indexes though. But still I'm not clear.

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5693 0
Hello World program in Java (CMD and Eclipse Examples)
In this article, I have explained the basic of creating first program in java,i.e, I have explained java hello world program by creating it using notepad and executing it using command prompt.
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Various Java programming examples with output
In this article, I have provided a list of useful java programming examples with output, which every java programming beginner or student must read.
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