Write a program in java to find a duplicate character.
package com.onurdesk.find.programs;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
public class DuplicateCharFinder {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public void findIt(String str) {
Map<Character, Integer> baseMap = new HashMap<Character, Integer>();
char[] charArray = str.toCharArray();
for (Character ch : charArray) {
if (baseMap.containsKey(ch)) {
baseMap.put(ch, baseMap.get(ch) + 1);
} else {
baseMap.put(ch, 1);
}
}
Set<Character> keys = baseMap.keySet();
for (Character ch : keys) {
if (baseMap.get(ch) > 1) {
System.out.println(ch + " is " + baseMap.get(ch) + " times");
}
}
}
public static void main(String a[]) {
DuplicateCharFinder dcf = new DuplicateCharFinder();
dcf.findIt("India is my country");
System.out.println("Thanks for visiting https://onurdesk.com");
}
}
Write a program to find duplicate numbers in java.
package com.onurdesk.find.programs;
import java.util.ArrayList;
import java.util.List;
public class FindDulicateNumbersInList {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public static void main(String[] args) {
List<Integer> list = new ArrayList<>();
for (int i = 0; i < 10; i++) {
list.add(i);
}
list.add(5);
list.add(2);
findDulicataes(list);
System.out.println();
System.out.println("Thanks for visiting https://onurdesk.com");
}
private static List<Integer> findDulicataes(List<Integer> list) {
List<Integer> listWithoutDuplicates = new ArrayList<>();
System.out.println("duplicate list is " + list);
System.out.println("dulicate elements are ");
for (int i : list) {
if (listWithoutDuplicates.contains(i)) {
System.out.print(i + " ");
} else {
listWithoutDuplicates.add(i);
}
}
return listWithoutDuplicates;
}
}
Write a program to find a duplicate character in string.
package com.onurdesk.find.programs;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
class FindDuplicats {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public static void dupChar(String s) {
Map<Character, Integer> map = new HashMap<>();
char[] ch = s.toCharArray();
for (char c : ch) {
if (map.containsKey(c)) {
map.put(c, map.get(c) + 1);
} else {
map.put(c, 1);
}
}
Set<Character> set = map.keySet();
for (char c1 : set) {
if (map.get(c1) > 1) {
System.out.println(c1 + " is " + map.get(c1) + " times");
}
}
}
}
public class FindDuplicatesCharInString {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter any String Here ");
String str = sc.nextLine();
FindDuplicats fd = new FindDuplicats();
fd.dupChar(str);
System.out.println("Thanks for visiting https://onurdesk.com");
}
}
Write a program to find duplicate elements from an array.
package com.onurdesk.find.programs;
import java.util.HashSet;
import java.util.Set;
public class FindDuplicatesElementsFromAnArray {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public static void main(String[] args) {
int duplicates[] = { 1, 51, 1, 5, 1, 41, 51, 12 };
Set<Integer> nonDuplicateSet = new HashSet<>();
Set<Integer> DuplicateSet = new HashSet<>();
for (Integer integer : duplicates) {
if (!nonDuplicateSet.contains(integer)) {
nonDuplicateSet.add(integer);
} else {
DuplicateSet.add(integer);
}
}
System.out.println("NONDuplicate Elements are" + nonDuplicateSet);
System.out.println("Duplicate Elements are" + DuplicateSet);
System.out.println("Thanks for visiting https://onurdesk.com");
}
}
Write a program to find factorial of number.
package com.onurdesk.find.programs;
import java.util.Scanner;
public class FindFactorial {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
System.out.println("Enter a number");
int x = s.nextInt();
int fact = 1;
int i;
for (i = 1; i <= x; i++) {
fact = fact * i;
}
System.out.println("factorial numner is " + fact);
System.out.println("Thanks for visiting https://onurdesk.com");
}
}
Write a program to find smallest and largest number in array.
package com.onurdesk.find.programs;
public class FindLargestAndSmallestNumberInArray {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public static void maxValue(int[] ar) {
int maxValue = ar[0];
for (int i = 0; i < ar.length; i++) {
if (ar[i] > maxValue) {
maxValue = ar[i];
}
}
System.out.println("Maximum of value is " + maxValue);
}
public static void minValue(int[] ar) {
int minValue = ar[0];
for (int i = 0; i < ar.length; i++) {
if (ar[i] < minValue) {
minValue = ar[i];
}
}
System.out.println("Minimum of value is " + minValue);
}
public static void main(String[] args) {
int[] arr = { 2, 5, 1, 1, 52, 12, 5 };
maxValue(arr);
minValue(arr);
System.out.println("Thanks for visiting https://onurdesk.com");
}
}
Write a program to find missing number in array.
package com.onurdesk.find.programs;
public class FindMissingNumberInArray {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public static void main(String[] args) {
int n;
int[] arr = { 1, 2, 3, 4, 5, 7 };
n = 7;
int excpted_output = n * ((n + 1) / 2);
int sum = 0;
for (int i : arr) {
sum = sum + i;
}
int result = excpted_output - sum;
System.out.println("Missing Number is " + result);
System.out.println("Thanks for visiting https://onurdesk.com");
}
}
Write a program to find second largest element in array.
package com.onurdesk.find.programs;
public class FIndSecondLargestElementInArray {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public static void main(String[] args) {
int[] a = { 23, 4, 55, 23, 45, 65, 223, 121, 43, 675 };
int tot = a.length;
System.out.println("Second largest number is " + getSecondLargest(a, tot));
System.out.println("Thanks for visiting https://onurdesk.com");
}
public static int getSecondLargest(int[] a, int tot) {
for (int i = 0; i < tot; i++) {
for (int j = i + 1; j < tot; j++) {
if (a[i] < a[j]) {
int temp = a[i];
a[i] = a[j];
a[j] = temp;
}
}
}
return a[tot - 2];
}
}
Write a program to find second smallest number in array.
package com.onurdesk.find.programs;
public class FindSecondSmallestNumberInArray {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public static void main(String[] args) {
int a[] = { 2, 3, 4, 5, 6, 2, 3, 561, 335, 121, 3241, 1231, 12, 1, 12 };
int size = a.length;
System.out.println("Second Smallest NUmber is " + getSecondSmallestNumber(a, size));
System.out.println("Thanks for visiting https://onurdesk.com");
}
public static int getSecondSmallestNumber(int a[], int size) {
for (int i = 0; i < size; i++) {
for (int j = i + 1; j < size; j++) {
if (a[i] < a[j]) {
int temp = a[i];
a[i] = a[j];
a[j] = temp;
}
}
}
return a[size - 2];
}
}
Write a program to find square root cube root of integer.
package com.onurdesk.find.programs;
import java.util.Scanner;
public class FindSqaureCubeSqrt {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
static public void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter any Integer Number ");
int num = sc.nextInt();
System.out.println("Square of " + num + " is " + Math.pow(num, 2));
System.out.println("cube of " + num + " is " + Math.pow(num, 3));
System.out.println("Square Root of " + num + " is " + Math.sqrt(num));
System.out.println("Thanks for visiting https://onurdesk.com");
}
}
Write a program to find sum and average of number.
package com.onurdesk.find.programs;
import java.util.Scanner;
public class FindSumAndInteger {
/**
* @author Onurdesk
*
* Thanks for visiting https://onurdesk.com like us on facebook :
* https://facebook.com/onurdesk
*/
public static void main(String[] args) {
int a, b, sum;
float avg;
Scanner sc = new Scanner(System.in);
System.out.println("Enter First Number");
a = sc.nextInt();
System.out.println("Enter Second Number");
b = sc.nextInt();
sum = a + b;
System.out.println("Sum is " + sum);
avg = (float) sum / 2;
System.out.println("Average is " + avg);
System.out.println("Thanks for visiting https://onurdesk.com");
}
}
