JavaAlgorithms/Sorts/InsertionSort.java
2017-08-20 07:50:29 -07:00

64 lines
1.6 KiB
Java

/**
*
* @author Varun Upadhyay (https://github.com/varunu28)
*
*/
class InsertionSort {
/**
* This method implements the Generic Insertion Sort
*
* @param array The array to be sorted
* @param last The count of total number of elements in array
* Sorts the array in increasing order
**/
public static <T extends Comparable<T>> void IS(T array[], int last) {
T key;
for (int j=1;j<last;j++) {
// Picking up the key(Card)
key = array[j];
int i = j-1;
while (i>=0 && key.compareTo(array[i]) < 0) {
array[i+1] = array[i];
i--;
}
// Placing the key (Card) at its correct position in the sorted subarray
array[i+1] = key;
}
}
// Driver Program
public static void main(String[] args) {
// Integer Input
int[] arr1 = {4,23,6,78,1,54,231,9,12};
int last = arr1.length;
Integer[] array = new Integer[arr1.length];
for (int i=0;i<arr1.length;i++) {
array[i] = arr1[i];
}
IS(array, last);
// Output => 1 4 6 9 12 23 54 78 231
for (int i=0;i<array.length;i++) {
System.out.print(array[i] + " ");
}
System.out.println();
// String Input
String[] array1 = {"c", "a", "e", "b","d"};
last = array1.length;
IS(array1, last);
//Output => a b c d e
for(int i=0; i<last; i++)
{
System.out.print(array1[i]+"\t");
}
}
}