1951 0
7 Ways to Merge or Split PDF Files in Java
In this article, we have provided 7 possible ways to merge or split PDF files using Java.
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Article
1792 2
How to convert InputStream to a string in Java?

Suppose I have a have java.io.InputStream object, how should I process that object and produce a String from it in java?

I would need a function which reads InputStream and output it as a String

thanks

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Type
Question
1315 0
Static Class in Java
In this article, I have explained about static class in java and how to use it, with an example.
Type
Article
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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Type
Question
162 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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Question

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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Article

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