Quicksort Java

What are Quicksort and Constructors in Java? Read On to Find the Answers

Quicksort, also known as partition-exchange sort, is a fast sorting algorithm. It is based on divide and conquer algorithm. Quicksort divides a long list into two sun-lists. These two sub-lists are the low element and the high elements.

Let’s go through this blog and torch light on the Quicksort Java.


Quick sort is a fast sorting algorithm. It is not only used for educational purposes, but is widely applied in practice. One an average, the complexity of Java, makes quicksort suitable for sorting big data volume. The idea and concept of the algorithm is fairly simple. Once you realize it, you can write quicksort as fast as bubble sort.


The divide-and-conquer strategy is used in quicksort. Here are the recursion steps you should know.

  • Pivot value – First of all, select a pivot value. Suppose you are selecting the middle element as pivot value. You can make any value which is in the range of sorted valued even if it doesn’t present in the array.
  • Partition: In this step, you need to rearrange all the elements in a way that all of them (which are lesser than the pivot) go to the left part. Added to that all the features that are larger than the pivot goes to the right part of the array. The values that are equal to the pivot value can remain in any part of the variety – whether left or right. Make sure the array is divided into non-equal parts.
  • Sort both parts: Now, you need to apply the quicksort algorithm recursively to the left and the right parts.

Advantaged of Quicksort Java

By applying the quicksort algorithm, it’s easy to parts a wide range of data into items that are less than the pivot and those that are greater than or equal to the pivot item. TO enjoy its benefits, you need to create the partitions. In the partitions, a random pivot item is created. The partition algorithm can be applied to the array of items. This initial step is the most challenging part of the quicksort algorithm.

There are three regions to partition: S1, S2, and the unknown. You need to place each item from the unknown to the suitable region. Then, you need to move the pivot between the two regions.

The main benefits of quicksort java are the efficient average case when compared to any sort algorithm and the elegant recursive definition.  It is also efficient. However, you may also face difficulty in implementing the partitioning algorithm.

Constructors in Java

The constructor in Java is a block of codes similar. It’s similar to a method. It is called the constructor when an instance of the object is developed, and memory is allotted for that object. It’s a special method required for initializing the object of a class.

The constructor declaration seems like process declaration. It must have the same name as that of the class and have no return type. Constructions are classified into two types:

  1. Default constructors – If you don’t define a constructor, then the compiler creates a default constructor. These constructors don’t consist of any limitations. And they created only if you don’t define any constructors.
  2. Parameterized constructors: Parameterized constructors are required for passing parameters on the creation of objects. You can overload constructors with different datatypes as its parameters. To communicate from one constructor to another in the same class, () is used.

So, these are the two terms of Java. If you want to enhance your knowledge, better join an online course.

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