Insertion Sort in Java

For theoretical reference:
http://en.wikipedia.org/wiki/Insertion_sort


Java Program:


public class InsertionSort {

    public static void main(String[] args) {
        int[] input = { 2, 7, 4, 1, 5, 3};
        insertionSort(input);
    }
   
    private static void printNumbers(int[] input) {       
        for (int i = 0; i < input.length; i++) {
            System.out.print(input[i] + ", ");
        }
        System.out.println("\n");
    }

    public static void insertionSort(int array[]) {
        int n = array.length;
        for (int j = 1; j < n; j++) {
            int key = array[j];
            int i = j-1;
            while ( (i > -1) && ( array [i] > key ) ) {
                array [i+1] = array [i];
                i--;
            }
            array[i+1] = key;
            printNumbers(array);
        }
    }
}

Bubble sort algorithm using array in Java.

For theoretical reference you can see wiki link.

http://en.wikipedia.org/wiki/Bubble_sort

For programmatic reference you can check this.


public class BubbleSort {

    public static void main(String[] args) {
       
        int arr[] = { 2, 7, 4, 1, 5, 3};
        showAll(bubbleSort(arr));
    }
   
    private static int [] bubbleSort(int arr[]){
        while(true){
            int count = 0;
            for (int i = 0; i < arr.length - 1; i++) {
                if(arr[i] > arr[i+1]){
                    int temp = arr[i];
                    arr[i] = arr[i + 1];
                    arr[i + 1] = temp;
                    count ++;
                }
            }
            if(count == 0)
                break;
        }
        return arr;
    }
   
    private static void showAll(int[] arr){
        for (int i : arr) {
            System.out.println("" + i);
        }
    }

}

Selection Sort in Java

For theoretical reference you can see wiki link.
http://en.wikipedia.org/wiki/Selection_sort

For programmatic reference you can check this.

public class SelectionSort {
   
    public static void main(String[] args) {
        int [] arr = {3, 4, 2, 1, 5, 10, 99, 12, 1, 7};
        showAll(descSort(arr));
    }

    private static int [] descSort(int[] arr){
        for(int i = 0; i <= arr.length -1; i++){
            for(int j = i+1; j < (arr.length); j++){
                if(arr[i] > arr[j]){
                    int temp = arr[i];
                    arr[i] = arr[j];
                    arr[j] = temp;
                }
            }
        }
        return arr;
    }
   
    private static void showAll(int[] arr){
        for (int i : arr) {
            System.out.println("" + i);
        }
    }
}