# Convert Decimal To Hex

Hey guys!! Welcome to flower brackets blog. Below is one such kind of conversion, that is, convert decimal to hex.

Conversion programs in java are very common. In this post let us learn decimal to hexadecimal java program.

Moving ahead, in number system decimal number has a base of ten. It has digits from 0 to 9. Whereas hexadecimal number has a base 16.

It has digits from 0 to 9 and A to F. Now let’s see the comparison through a table,

As you can see in the above table, from 0 to 9 the numbers are same in both number system.

Then after 10, 10 is denoted as ‘A’, 11 is denoted as ‘B’, 12 is denoted as ‘C’, 13 is denoted as ‘D’, 14 is denoted as ‘E’, 15 is denoted as ‘F’ in the hexadecimal system.

In the previous post we saw how to convert binary to decimal and decimal to binary java program.

In this program Scanner class is used.  String java.lang.Integer.toHexString(int i) is used to convert decimal value to hexadecimal format.

So, let’s see java program to convert decimal to hexadecimal,

#### Example: convert decimal to hex

```import java.util.Scanner;

public class DecimalToHex
{
int number;
Scanner sc;

void getVal()
{
System.out.println("Conversion from Decimal to Hexadecimal" );
sc = new Scanner(System.in);
number = Integer.parseInt(sc.nextLine());
}

void toConvert()
{
String hex = Integer.toHexString(number);
System.out.println("The converted Hexadecimal value is: " + hex);
}

public static void main(String[] args)
{
DecimalToHex dth = new DecimalToHex();
dth.getVal();
dth.toConvert();
}
}

```

Output:

Without using methods

Now we will see convert decimal to hexadecimal java without using predefined methods and using a while loop.

So, let’s get into it,

```import java.util.Scanner;

{
public static void main(String[] args)
{
int temp, decimalNumber;
char hexa[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};

Scanner sc = new Scanner(System.in);
System.out.print("Please enter decimal number : ");
decimalNumber = sc.nextInt();

while(decimalNumber > 0)
{
temp = decimalNumber % 16;
decimalNumber = decimalNumber / 16;
}

System.out.print("The hexadecimal value of " + decimalNumber + " is : " + hexaDecimal);
sc.close();
}
}

```

Output:

Please enter decimal number : 10
The hexadecimal value of 0 is : A

Using toHexString()

Here we will see the conversion of decimal to hex in java using java tohexstring method.

Let’s see the code implementation,

```import java.util.Scanner;

public class DecimalToHexaExample
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
System.out.print("Please enter decimal number : ");
int decimalNumber = sc.nextInt();
String str = Integer.toHexString(decimalNumber);
System.out.println("The hexadecimal value is : " + str);
sc.close();
}
}

```

Output:

Please enter decimal number : 10
The hexadecimal value is : a

#### Convert decimal to hex – using recursion

Now we are going to execute a java program to convert decimal to hexadecimal using recursion.

```import java.util.Scanner;

{
char hexa[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
int temp;
{
if(num != 0)
{
temp = num % 16;
num = num / 16;
}
}

public static void main(String[] args)
{
int decimalNumber;
Scanner sc = new Scanner(System.in);
decimalNumber = sc.nextInt();
System.out.println("The hexadecimal value is : ");
System.out.print(str);
sc.close();
}
}

```

Output: