Some basic Array Operations

src/Array.java

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+import java.util.Arrays;
+
+public class Array {
+
+    public static void findMaxOfArray() {
+        int[] a = {15, 29, 38, 14, 56, 6, 7};
+        double max = a[0];
+        for (int i = 1; i < a.length; i++) {
+            if (a[i] > max) {
+                max = a[i];
+            }
+        }
+        System.out.println("Maximum element in array is: " + max);
+    }
+
+    public static void averageOfArray() {
+        int[] a = {15, 29, 38, 14, 56, 6, 7};
+        int N = a.length;
+        double sum = 0.0;
+        for (int i = 0; i < N; i++) {
+            sum += a[i];
+        }
+        double average = sum / N;
+
+        System.out.println("Average of given array is: " + average);
+    }
+
+    public static void copyToAnotherArray() {
+        int[] a = {15, 29, 38, 14, 56, 6, 7};
+        int N = a.length;
+        int[] b = new int[N];
+
+        for (int i = 0; i < N; i++) {
+            b[i] = a[i];
+        }
+
+        System.out.println(Arrays.toString(b));
+    }
+
+    public static void reverseTheArray() {
+        int[] a = {15, 29, 38, 14, 56, 6, 7};
+        int N = a.length;
+
+        for (int i = 0; i < N / 2; i++) {
+            int temp = a[i];
+            a[i] = a[N - 1 - i];
+            a[N - 1 - i] = temp;
+        }
+
+        System.out.println("Reversed elements of an array is: " + Arrays.toString(a));
+    }
+
+    public static void matrixMatrixMultiplication() {
+        int[][] a = {{15, 29, 38}, {14, 56, 6}};
+        int[][] b = {{7, 6, 56}, {14, 38, 29}};
+
+        int N = a.length;
+
+        int[][] c = new int[N][N];
+
+        for (int i = 0; i < N; i++) {
+            for (int j = 0; j < N; j++) {
+                for (int k = 0; k < N; k++) {
+                    c[i][j] += a[i][k] * b[k][j];
+                }
+            }
+        }
+        print2DArray(c);
+    }
+
+    public static void print2DArray(int[][] array) {
+        for (int i=0;i<array.length;i++){
+            for (int j=0;j<array[i].length;j++){
+                System.out.print(array[i][j]+" ");
+            }
+            System.out.println();
+        }
+    }
+
+    public static void main(String[] args) {
+        findMaxOfArray();
+        averageOfArray();
+        copyToAnotherArray();
+        reverseTheArray();
+        matrixMatrixMultiplication();
+    }
+}