Sunday, March 31, 2013

Program to sort the numbers using merge Sort



package com.swain.cell;

public class UsingMergeSort {

       public static void main(String[] args) {
              // TODO Auto-generated method stub
              UsingMergeSort obj = new UsingMergeSort();
              int a[] = { 34, 56, 23, 55, 78, 3, 88 };

              UsingMergeSort.divide(a, 0, 6);
              for (int i = 0; i < a.length; i++)
                     System.out.println("---" + a[i]);

       }

       public static void divide(int array[], int low, int high) {
              System.out.println("divide method");

              if (low < high) {
                     int mid = (low + high) / 2;
                     divide(array, mid, low);
                     divide(array, mid + 1, high);
                     UsingMergeSort.mergeArray(array, low, mid, high);
              }
       }

       public static void mergeArray(int array[], int low, int mid, int high) {
              System.out.println("MErger method");
              int tempArray[] = new int[array.length];
              int i = low;
              int j = low;
              int k = mid + 1;
              for (int l = 0; l < array.length; l++) {
                     System.out.println(array[l]);
              }

              while (j <= mid && k <= high) {
                     if (array[j] <= array[k]) {
                           tempArray[i] = array[j];
                           i++;
                           j++;
                     } else {
                           tempArray[i] = array[k];
                           k++;
                           i++;
                     }

              }
              for (; j < mid; j++) {
                     tempArray[i] = array[j];
                     i++;
              }
              for (; k < high; k++) {
                     tempArray[i] = array[k];
                     i++;
                     k++;
              }
              for (int l = 0; l < array.length; l++) {
                     System.out.println("Sorted" + tempArray[l]);
              }
              for (i = 0; i < tempArray.length; i++)
                     array[i] = tempArray[i];

       }

}

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