Create BubbleSort.java

Implementation of bubble sort algorithm.

Author: amarnathbarpanda

BubbleSort.java

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+import java.util.Scanner;
+
+public class BubbleSort {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();
+        int[] arr = new int[n];
+        for (int i = 0; i < n; i++)
+            arr[i] = sc.nextInt();
+        bubble(arr);
+        for (int i : arr) {
+            System.out.print(i + " ");
+        }
+        sc.close();
+    }
+
+    public static void bubble(int[] arr) {
+        for (int i = 1; i <= arr.length - 1; i++)
+            for (int j = 0; j < arr.length - i; j++)
+                if (isSmaller(arr, j + 1, j))
+                    swap(arr, j + 1, j);
+    }
+
+    public static boolean isSmaller(int[] arr, int i, int j) {
+        System.out.println("Comparing " + arr[i] + " with " + arr[j]);
+        if (arr[i] < arr[j])
+            return true;
+        else
+            return false;
+    }
+
+    public static void swap(int[] arr, int i, int j) {
+        System.out.println("Swapping " + arr[i] + " and " + arr[j]);
+        int temp = arr[i];
+        arr[i] = arr[j];
+        arr[j] = temp;
+    }
+}