From 33f249c4d1ad709ef2ac7be1fabc9f25a892aa54 Mon Sep 17 00:00:00 2001
From: Nishant Sharma <42864292+goldenryu2000@users.noreply.github.com>
Date: Thu, 1 Oct 2020 12:16:01 +0530
Subject: [PATCH] Added Programs for Merge and Bubble Sort.

Hope you like these Two Array Sorting Techniques.
---
 BubbleSort.java | 51 ++++++++++++++++++++++++++
 MergeSort.java  | 96 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 147 insertions(+)
 create mode 100644 BubbleSort.java
 create mode 100644 MergeSort.java

diff --git a/BubbleSort.java b/BubbleSort.java
new file mode 100644
index 0000000..bd651cd
--- /dev/null
+++ b/BubbleSort.java
@@ -0,0 +1,51 @@
+public class BubbleSort {
+
+    public static void bubbleSort(int[] arr)
+    {
+        int n = arr.length;
+        int flag = 0;
+        for(int i=0;i<n-1;i++)
+        {	flag = 0;
+            for(int j = 0; j<n-i-1; j++) //Since the sorting in Bubble sort  takes place from the end,so that's why (n-i-1).
+            {
+                if(arr[j]>arr[j+1])
+                {
+                    int temp = arr[j];
+                    arr[j] = arr[j+1];
+                    arr[j+1] = temp;
+                    flag=1;
+                }
+            }
+            if(flag==0) break;	  //This exits the loop if the swap statement in inner j loop doesn't execute, it means the array is sorted.
+        }
+    }
+
+    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 = {64, 34, 25, 12, 22, 11, 90};
+
+        System.out.println("Before Sorted Array");
+        printArray(arr);
+
+        bubbleSort(arr);
+
+        System.out.println("Sorted Array");
+        printArray(arr);
+    }
+
+}
+
diff --git a/MergeSort.java b/MergeSort.java
new file mode 100644
index 0000000..97781f9
--- /dev/null
+++ b/MergeSort.java
@@ -0,0 +1,96 @@
+public class MergeSort {
+    void merge(int arr[], int l, int m, int r)
+    {
+        //Find the sizes of the subarrays to be merged.
+        int n1 = m - l + 1;
+        int n2 = r - m;
+
+        /* Create temp arrays*/
+        int L[] = new int[n1];
+        int R[] = new int[n2];
+
+
+        /*Copy the data to temp arrays*/
+        for (int i = 0; i < n1; ++i)
+            L[i] = arr[l + i];
+        for (int j = 0; j < n2; ++j)
+            R[j] = arr[m + 1 + j];
+
+
+        /* Merge the temp arrays*/
+
+
+        // Initial values of first and second subarrays.
+        int i = 0, j = 0;
+
+        //Initial index of merged subarray
+        int k = l;
+        //Merging tha arrays
+        while (i < n1 && j < n2) {
+            if (L[i] <= R[j]) {
+                arr[k] = L[i];
+                i++;
+            }
+            else {
+                arr[k] = R[j];
+                j++;
+            }
+            k++;
+        }
+
+        /*Copy the remaining elements of L[] if any*/
+        while (i < n1) {
+            arr[k] = L[i];
+            i++;
+            k++;
+        }
+
+        /*Copy remaining elements of R[] if any*/
+        while (j < n2) {
+            arr[k] = R[j];
+            j++;
+            k++;
+        }
+    }
+
+
+    void sort(int arr[], int l, int r)
+    {
+        if (l < r) {
+            //Find the middle point.
+            int m = (l + r) / 2;
+
+            //Sort first and second half.
+            sort(arr, l, m);
+            sort(arr, m + 1, r);
+
+            //Merge the sorted halves
+            merge(arr, l, m, r);
+        }
+    }
+
+
+    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[] = { 493,227,349,24,157,111,326,69,56,104,92,60,144,211,342,643,23,115,22 }; //Just a random array
+
+        System.out.println("Given Array");
+        printArray(arr);
+
+        MergeSort ob = new MergeSort();
+        ob.sort(arr, 0, arr.length - 1);
+
+        System.out.println("\nSorted array");
+        printArray(arr);
+
+    }
+
+}