Find Minimum and Maximum value of Array in Java

Find Minimum and Maximum value of Array in Java

public class FindMinAndMaxValueInArray {

       public static void main(String[] args) {

              int arr[] = { 69, 23, 47, 81, 92, 88, 52, 48, 56, 66, 65, 76, 71, 85,

                           49, 53, 56, 61, 65, 84 };

              findMaxValue(arr);

              findMinValue(arr);

       }

       public static void findMinValue(int[] arr) {

              int min = arr[0];

              for (int i = 0; i < arr.length; i++) {

                     if (min > arr[i]) {

                           min = arr[i];

                     }

              }

              System.out.println("minimum value of the array is:" + min);

       }

       public static void findMaxValue(int[] arr) {

              int max = arr[0];

              for (int i = 0; i < arr.length; i++) {

                     if (max < arr[i]) {

                           max = arr[i];

                     }

              }

              System.out.println("maximum value of array is:" + max);

       }

}

output

maximum value of array is:92
minimum value of the array is:23

Find Duplicates in an array

Find Duplicates in an array

package com.blogspot.rajvishwakarma15;

public class CheckDuplictesInArray {

       public static void main(String[] args) {

              String[] strArr = new String[] { "a", "b", "c", "s", "d", "e", "a",

                           "b", "s" };

              detectDuplicates(strArr);

       }

       public static void detectDuplicates(String[] arr) {

              for (int i = 0; i < arr.length; i++) {

                     for (int j = i + 1; j < arr.length; j++) {

                           if (arr[j] == arr[i]) {

                      System.out.println("Duplicate found! Original was at location "

                               + (i + 1) + " and match is at " + (j + 1));

                                  System.out.println("Duplicated value is:" + arr[j]);

                           }

                     }

              }

       }

}

OUTPUT

Duplicate found! Original was at location 1 and match is at 7 Duplicated value is:a

Duplicate found! Original was at location 2 and match is at 8 Duplicated value is:b

Duplicate found! Original was at location 4 and match is at 9 Duplicated value is:s

Java Program To Find Second Largest Number in Array

public class SecondLargestNumberInArray {

       public static void main(String[] args) {

              int arr[] = { 18, 23, 77, 81, 92, 88, 52, 48, 26, 66, 65, 76, 11, 85,

                           99, 53, 26, 61, 65, 34 };

              secondLargeNumber(arr);

       }

       public static void secondLargeNumber(int[] arr) {

              int largest = arr[0];

              int secondLargest = arr[0];

              for (int i = 0; i < arr.length; i++) {

                     if (arr[i] > largest) {

                           secondLargest = largest;

                           largest = arr[i];

                          

                     } else if (arr[i] > secondLargest) {

                           secondLargest = arr[i];

                         

                     }

              }

              System.out.println("second largest in array is:" + secondLargest);

       }

}

OutPut:

Second Largest in array is: 92