InsertionSort.java

// Java program for implementation of Insertion Sort
class InsertionSort{
    void sort(int arr[]){
        int n = arr.length;
        for (int i=1; i<n; ++i){
            int key = arr[i];
            int j = i-1;
 
            while (j>=0 && arr[j] > key){
                arr[j+1] = arr[j];
                j = j-1;
            }
            arr[j+1] = key;
        }
    }
 
    static void printArray(int arr[]){
        int n = arr.length;
        for (int i=0; i<n; ++i)
            System.out.print(arr[i] + " ");
 
        System.out.println();
    }
 
    public static void main(String args[]){        
        int arr[] = {12, 11, 13, 5, 6};
 
        InsertionSort ob = new InsertionSort();        
        ob.sort(arr);
         
        printArray(arr);
    }
}