Java program to convert decimal to hexadecimal

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 Convert Decimal to hexadecimal Using toHexString() method

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import java.util.Scanner;
class Main
{
    public static void main(String args[])
    {
      Scanner scanner = new Scanner( System.in );
      System.out.print("Enter the decimal number you want to convert in Hexadecimal : ");
      int number =scanner.nextInt();
        
      String hexstr = Integer.toHexString(number);
      System.out.println("Afer conversion from Decimal to hexadecimal is: "+hexstr);
    }
}

Output:-

Enter the decimal number you want to convert in Hexadecimal : 1234
Afer conversion from Decimal to hexadecimal is: 4D2

 

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Convert Decimal to hexadecimal without using predefined method in Java

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import java.util.Scanner;
class Main
{
   public static void main(String args[])
   {
     Scanner scanner = new Scanner( System.in );
     System.out.print("Enter the decimal number you want to convert in Hexadecimal : ");
     int number =scanner.nextInt();
        
    
     int remainder;
        
   
   
     String hexstr=""; 
  
   
     char hexarr[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
 
     while(number>0)
     {
       remainder=number%16; 
       hexstr=hexarr[remainder]+hexstr; 
       number=number/16;
     }
     System.out.println("Afer conversion from Decimal to hexadecimal is: "+hexstr);
  }
}

Output:-

Enter the decimal number you want to convert in Hexadecimal : 1234
Afer conversion from Decimal to hexadecimal is: 4D2

 

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