JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

Checkout for Promo Codes

Program: Implement selection sort in java.


The selection sort is a combination of searching and sorting. During each pass, the unsorted element with the smallest (or largest) value is moved to its proper position in the array. The number of times the sort passes through the array is one less than the number of items in the array. In the selection sort, the inner loop finds the next smallest (or largest) value and the outer loop places that value into its proper location.

Selection Sort

Selection sort is not difficult to analyze compared to other sorting algorithms since none of the loops depend on the data in the array. Selecting the lowest element requires scanning all n elements (this takesn − 1 comparisons) and then swapping it into the first position. Finding the next lowest element requires scanning the remaining n − 1 elements and so on, for (n − 1) + (n − 2) + ... + 2 + 1 = n(n − 1) / 2 ∈ Θ(n2) comparisons. Each of these scans requires one swap for n − 1 elements.


package com.java2novice.algos;

public class MySelectionSort {

	public static int[] doSelectionSort(int[] arr){
		
	    for (int i = 0; i < arr.length - 1; i++)
	    {
	        int index = i;
	        for (int j = i + 1; j < arr.length; j++)
	            if (arr[j] < arr[index]) 
	                index = j;
	 
	        int smallerNumber = arr[index];  
	        arr[index] = arr[i];
	        arr[i] = smallerNumber;
	    }
	    return arr;
	}
	
	public static void main(String a[]){
		
		int[] arr1 = {10,34,2,56,7,67,88,42};
		int[] arr2 = doSelectionSort(arr1);
		for(int i:arr2){
			System.out.print(i);
			System.out.print(", ");
		}
	}
}

Output:
2, 7, 10, 34, 42, 56, 67, 88, 
<< Previous Program | Next Program >>

Java Sorting Algorithms Examples

  1. Implement bubble sort in java.
  2. Implement selection sort in java.
  3. Implement insertion sort in java.
  4. Implement quick sort in java.
  5. Implement merge sort in java.
Knowledge Centre
Domain Naming Service(DNS)
It is very difficult to remember a set of numbers (IP address) to connect to the Internet. The Domain Naming Service(DNS) is used to overcome this problem. It maps one particular IP address to a string of characters. For example, www.java2novice.com implies com is the domain name reserved for US commercial sites, java2novice is the name of the company and www is the name of the specific computer, which is java2novice's server.
Famous Quotations
Good judgment comes from experience, and experience comes from bad judgment.
-- Barry LePatner

About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].com.

Most Visited Pages

Other Interesting Sites

Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
Privacy Policy | Copyright © 2020 by Nataraja Gootooru. All Rights Reserved.