Sorting DecendingOrder by Using TreeSet Collection

import java.util.*;

public class SortingDescending {
  @SuppressWarnings("unchecked")
    public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    int[] num = new int [10];
    int count = 0;
while(count< num.length){
      num[count]= input.nextInt();
      ++count;
     }
    TreeSet tree = new TreeSet()      ;  

for(int i = 0; i < num.length; i++){
tree.add(num[i])        ;
      }
System.out.println (" The numbers of the array in descrending order are: " +  tree.descendingSet() );
   }
}
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Find Prime Factors

import java.util.Scanner;

public class PrimeFactor{

public static void main(String [] args){

int number = 1, check = 0;

Scanner input = new Scanner(System.in);

while(check != 1){

System.out.println("Please enter an integer");

number = input.nextInt();

if(number == 0){

check = 1;

}

else if(number < 0){

System.out.print("-1 ");

number = number * -1;

while(number > 1){

int count = 2;

while(count <= number){

if(number% count == 0){

number = number / count;

System.out.print(" x " + count);

Convert Binary to Decimal

import java.util.Scanner;

public class BinaryToDecimal {

    public static void main(String[] args) {

     

        System.out.println("Enter a binary number: ");

        Scanner scanStr = new Scanner(System.in);

             

        int decimalNum = 0;     

             

        if(scanStr.hasNext())

        {  

            try

            {

                decimalNum = Integer.parseInt(scanStr.next(),2);

     System.out.println("Binary number in decimal is: "+decimalNum); 

            }

            catch(NumberFormatException nfe)

            {

                System.out.println("The number is not a binary number.");

            }

        } 

    }

}