Convert Integer to Hexadecimal in Java – Easy Tutorial

How to Convert Integer to Hexadecimal in Java

Hexadecimal is a base 16 numbering system. It assigns each character a certain numerical value, so that data can be stored and manipulated more easily. In some programming languages, such as Java, it is necessary to convert an integer into its hexadecimal equivalent in order to manipulate the data efficiently. Here is how you can easily convert an integer to hexadecimal in Java.

Using the Integer.toHexString() Method

The simplest and most efficient way to convert an integer to hexadecimal in Java is by using the Integer.toHexString() method. This method takes an integer and returns the hexadecimal representation of the given number in String form. Here is an example of how to use this method:

int integer = 10;

String hexValue = Integer.toHexString(integer);

//hexValue is now "a"

Using the Bitwise Operators

Another way to convert an integer to a hexadecimal representation is by using bitwise operators. This method works by picking out the individual bits of the integer and then converting each bit to its corresponding hexadecimal value. Here is an example of how to use this method:

int integer = 10;
 
String hexValue = "";
 
while (integer > 0) {
    int remainder = integer % 16;
    if (remainder < 10) {
        hexValue = remainder + hexValue;
    } else {
        switch (remainder) {
            case 10: hexValue = "A" + hexValue;
                     break;
            case 11: hexValue = "B" + hexValue;
                     break;
            case 12: hexValue = "C" + hexValue;
                     break;
            case 13: hexValue = "D" + hexValue;
                     break;
            case 14: hexValue = "E" + hexValue;
                     break;
            case 15: hexValue = "F" + hexValue;
                     break;
        }
    }
    integer /= 16;
}

//hexValue is now "A"

Both of these methods make it easy to convert integers to hexadecimal representations in Java. Understanding how these methods work can help you become a better programmer and handle data manipulation tasks more efficiently.