Java program to convert decimal to binary using toBinaryString and stack

public class DecimalToBinary
{
   public static void main(String[] args)
   {
      System.out.println("decimal to binary using toBinaryString() 104: ");
      // to binary string java
      System.out.println(Integer.toBinaryString(104));
      System.out.println("\ndecimal to binary using toBinaryString() 554: ");
      // tobinarystring
      System.out.println(Integer.toBinaryString(554));
      System.out.println("\ndecimal to binary using toBinaryString() 644: ");
      System.out.println(Integer.toBinaryString(644));
   }
}


 

import java.util.*;
public class DecimalBinaryExample
{
   public static void main(String[] args)
   {
      Scanner sc = new Scanner(System.in);                
      Stack<Integer> numStack = new Stack<Integer>();     
      System.out.println("Please enter a decimal number : ");
      int number = sc.nextInt();
      while(number != 0)
      {
         int a = number % 2;
         numStack.push(a);
         number /= 2;
      }
      System.out.println("Binary number : ");
      while(!(numStack.isEmpty()))
      {
         System.out.print(numStack.pop());
      }
      System.out.println();
      sc.close();
   }
}

public class FunctionDecimalToBinary
{
   public static void main(String[] args) 
   {
      int num = 104;
      functionToBinary(num);
   }
   static void functionToBinary(int number) 
   { 
      int[] binary = new int[1000]; 
      int a = 0;
      while(number > 0)
      { 
         binary[a] = number % 2; 
         number = number / 2; 
         a++; 
      }
      // printing binary number in reverse order
      System.out.println("Function to convert decimal to binary in java: ");
      for(int b = a - 1; b >= 0; b--)
      {
         System.out.print(binary[b]);
      }
   }
}

import java.util.Scanner;
public class DecimalToBinaryForLoop 
{
   public static void main(String[] args) 
   {
      Scanner sc = new Scanner(System.in);
      System.out.println("Please enter a decimal number: ");
      int inputNumber = sc.nextInt();
      System.out.println("Convert decimal to binary using for loop: " + convertToBinary(inputNumber));
      sc.close();
   }
   public static long convertToBinary(int number)
   {
      long binaryNumber = 0;
      int remainder, a;
      for(a = 1; number != 0; a = a * 10)
      {
         remainder = number % 2;
         number /= 2;
         binaryNumber += remainder * a;
      }
      return binaryNumber;
   }
}