How to write a selection sort program in java

Insertion sort is very similar in that after the kth iteration, the first k elements in the array are in sorted order. Simple calculation shows that insertion sort will therefore usually perform about half as many comparisons as selection sort, although it can perform just as many or far fewer depending on the order the array was in prior to sorting. It can be seen as an advantage for some real-time applications that selection sort will perform identically regardless of the order of the array, while insertion sort's running time can vary considerably. However, this is more often an advantage for insertion sort in that it runs much more efficiently if the array is already sorted or "close to sorted.

How to write a selection sort program in java

Assume that we wish to sort the array in increasing order, i. We begin by selecting the largest element and moving it to the highest index position.

We can do this by swapping the element at the highest index and the largest element. We then reduce the effective size of the array by one element and repeat the process on the smaller sub array.

The process stops when the effective size of the array becomes 1 an array of 1 element is already sorted. For example, consider the following array, shown with array elements in sequence separated by commas: The leftmost element is at index zero, and the rightmost element is at the highest array index, in our case, 4 the effective size of our array is 5.

how to write a selection sort program in java

The largest element in this effective array index is at index 2. We have shown the largest element and the one at the highest index in bold. We then swap the element at index 2 with that at index 4.

We reduce the effective size of the array to 4, making the highest index in the effective array now 3. The largest element in this effective array index is at index 1, so we swap elements at index 1 and 3 in bold: The next two steps give us: The last effective array has only one element and needs no sorting.

The entire array is now sorted. The algorithm for an array, x, with lim elements is easy to write down: We may be concerned about the efficiency of our algorithm and its implementation as a program. The efficiency of an algorithm depends on the number of major computations involved in performing the algorithm.

The efficiency of the program depends on that of the algorithm and the efficiency of the code implementing the algorithm. A function call requires added processing time in order to store argument values, transfer program control, and retrieve the returned value.

When a function call is in a loop that may be executed many times, the extra processing time may become significant. Thus, if the array to be sorted is quite large, we can improve program efficiency by eliminating a function call to swap data elements.This is a Java Program to Sort the Array in an Ascending Order.

Enter size of array and then enter all the elements of that array. Now with the help of for loop and temp . For information on these, refer to How to Write a List Selection Listener in the Writing Event Listeners lesson.

NOTE: Selection data actually describes selected cells in the "view" (table data as it appears after any sorting or filtering) rather than in the table model. Programming Languages. Computer Programming.

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How do we write a C++ program for a selection sort? Update Cancel. ad by Jira Software, Atlassian. Jira official site. One tool to track issues & release great software. Try Jira for free. Free Trial at You dismissed this ad.

This is a Java Program to implement Selection Sort on an integer array. Selection sort is a sorting algorithm, specifically an in-place comparison sort.

It has O(n2) time complexity, making it inefficient on large lists, and generally performs worse than the similar insertion sort. A variation of selection sort is used in the Hand class that was introduced in Subsection (By the way, you are finally in a position to fully understand the source code for Hand class class from that section; note that it uses source file is

In the Hand class, a hand of playing cards is represented by an ArrayList. Selection Sort in Java (Another way) You can also use a method where array is not predefined. Here, user has to put the elements as input. In the following Java program, we ask user to enter the array elements or number, now compare the array's element and start swapping with the variable temp.

Heap Sort Algorithm