What Is Java Stream?

• Java stream introduced in Java 8
• Stream is nothing but a collection of strings
• It is a sequence of objects that supports various methods which can be pipelined to produce the desired output
• We will understand more with the help of a diagram about the java stream

Some Key Features of Java Stream

• It is not a data structure but it takes input from collections, arrays, etc.
• It does not change the original data structures but it provides the output as per the pipelined methods.

Here are some different operations related to the streams. There are many methods/operations in the Java streams but we will discuss Some methods in this blog that we commonly use in our day-to-day life.

1)Map

It is an intermediate operation of the java stream. It is used to return a stream consisting of the results of applying the given function to the elements of this stream.

Let’s Have a Quick Example of the Map Operations

The output of the above program:

2)Filter Operation

Filter operation is also an intermediate operation and it is used to select elements as per the Predicate passed as an argument.

Let’s have a Quick example of the filter operation:

The output of the above program

3)Sorted

Sorted is also an intermediate operation. And it is used to sort a stream.

Let’s have a Quick example of the Sorted operation:

The output of the above program:

 

 

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4)Collect

Colette operation is a terminal operation and It use to return the result of the intermediate operations performed on the stream.

Let’s have a Quick example of the Collect operation

The output of the above program:

5)Foreach

It is also a terminal operation and It uses to iterate through every element of the string.

Let’s have a Quick example of the Foreach operation:

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6)Reduce

It is also a terminal operation. And its uses to reduce the elements of a stream to a single value. and it takes a binary operation as a parameter.

Let’s have a Quick example of the reduced operation

The output of the above program

Overall summarize these are some methods that we have seen in this blog with examples. I hope it will help you.

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