Skip to main content

Insertion Sort in JAVA

What is insertion sort?

It is a sorting technique that is based on the partitioning of array into two parts like selection sort, sorted and unsorted.

The process is:-

compare adjacent elements.
if(left > right)
Swap the element
{
check for sorted array whether it is still in sort manner(put j=i and loop in until j is not equal to zero)
- No
check for if(right<left)
swap
do it until at the end of position.
}

Implementation:-

Underline eleemnts are part of sorted array

inside main array loop 14 27 10 33 35 19 42 4 (14 10 27 33 35 19 42 4 (here sorted array is distorted hence sorting has been done inside the loop)
    inside sorted array loop 10 14 27 33 35 19 42 4 
inside main array loop 10 14 27 33 35 19 42 4 
inside main array loop 10 14 27 33 35 19 42 4 
inside main array loop 10 14 27 33 35 19 42 4 
    inside sorted array loop 10 14 27 19 33 35 42 4 
    inside sorted array loop 10 14 19 27 33 35 42 4 
inside main array loop 10 14 19 27 33 35 42 4 
inside main array loop 10 14 19 27 33 35 42 4 
    inside sorted array loop 10 14 19 27 33 4 35 42 
    inside sorted array loop 10 14 19 27 4 33 35 42 
    inside sorted array loop 10 14 19 4 27 33 35 42 
    inside sorted array loop 10 14 4 19 27 33 35 42 
    inside sorted array loop 10 4 14 19 27 33 35 42 
    inside sorted array loop 4 10 14 19 27 33 35 42 
inside main array loop 4 10 14 19 27 33 35 42 (final sorted array)

Program:-


package sorting;

public class InsertionSort {

 //function to print array
   public static void print(int[] arr)
   {
    for(int i=0;i<=arr.length-1;i++)
     System.out.print(" "+arr[i]);
    System.out.println(" ");
   }
   
   //function to swap elements
   public static int[] swap(int[] arr,int i, int j)
   {
    int temp;
    temp=arr[i];
    arr[i]=arr[j];
    arr[j]=temp;
    
    return arr;
   }
  
  public static void main(String[] args)
  {
   int[] arr={14,27,10,33,35,19,42,4};
   int j;
   for(int i=0;i<arr.length-1;i++)
   {
    if(arr[i]>arr[i+1])
    {
     swap(arr,i,(i+1));
     j=i;
     for(;j>0;j--)
     {
      if(arr[j]<arr[j-1])
      {
       swap(arr,j,(j-1));
       System.out.print("    "+"inside sorted array loop");
       print(arr);
      }
     }
     
    }
    System.out.print("inside main array loop");
    print(arr);
   }
   
   
  }
}

Comments

.

Popular posts from this blog

Heap implementation in JAVA

In this tutorial we will see all the functionalities of heaps implemented through java language.



package com.problems.heap;publicclassHeapFunctions{//Function to generate maxheapify where root is max than childspublicvoidmaxHeapify(int Arr[],int i,int N){int largest;int left =2*i+1;//left childint right =2*i +2;//right child System.out.println("left"+" "+left); System.out.println("right"+" "+right); System.out.println("Max size"+" "+N);if(left< N && Arr[left]> Arr[i]){ largest = left; System.out.println("largest left"+largest);}else{ largest = i; System.out.println("largest i"+largest);}if(right < N && Arr[right]> Arr[largest]){ largest = right; System.out.println("largest right"+largest);}if(largest != i ){ System.out.println("No largest"+largest); Arr=swap (A…

5 books that your college doesn’t tell to read seriously for PLACEMENTS

1.Let us C - It can be the best book to pick in your first semester itself. The book is written in a very simple style so you can easily grasp most of the concepts of programming by just working hard on it. It will help you in building basics of programming around c language.

2.HEAD FIRST JAVA-This book you should buy in third semester and invest your whole second year into it by working on all the codes. This book will help you teaching the concepts in a very attractive way. You will never bore while working  through this book.


3.Data Structure Made Easy In Java - As soon you finished studying core java in the 4th semester just pick this book to understand the logic’s of data structure and algorithms. It will help you to go deep inside this subject from which questions are frequently asked in all the interviews. This book carries a great set of problems that will help in developing intellectual knowledge around algorithms.


4.Cracking The Coding Interview – This book you should start pra…