java program to convert char array to String

java program to convert char array to String

public class ConvertCharArrayToString {

       public static void main(String[] args) {

              char[] charArr = { 'w', 'e', 'l', 'c','o','m','e',' ','R', 'a',' j' };

              String str = new String(charArr);

              System.out.println("converted String is:" + str);

              String str1 = String.valueOf(charArr);

              System.out.println("covnverted String is:" + str1);

       }

}

OUTPUT
converted String is:welcome Raj
covnverted String is:welcome Raj

java program to convert String to char array

java program to convert String to char array

public class ConvertStringToCharArray {

       public static void main(String[] args) {

              String str="welcome Raj";

              char[] charArr=str.toCharArray();

              for(char temp:charArr){

                     System.out.println(temp);

              }

       }

}

OUTPUT

w

e

l

c

o

m

e

R

a

j

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

Write a program to find sum of each digit in the given number using recursion.

Description:

Below example shows how to find out sum of each digit in the given number using recursion logic. For example, if the number is 259, then the sum should be 2+5+9 = 16.

package com.blogspot.rajvishwakarma18; public class MyNumberSumRec {     int sum = 0;           public int getNumberSum(int number){                   if(number == 0){             return sum;         } else {             sum += (number%10);             getNumberSum(number/10);         }         return sum;     }           public static void main(String a[]){         MyNumberSumRec mns = new MyNumberSumRec();         System.out.println("Sum is: "+mns.getNumberSum(223));     } }

Output: Sum is: 7