In Java, you can convert a decimal (base 10) number to a hexadecimal (base 16) number using the Integer.toHexString() method. Here’s an example:
int decimalNumber = 1234; String hexadecimalNumber = Integer.toHexString(decimalNumber); System.out.println(hexadecimalNumber); // Output: 4d2
In this example, we first declare an integer variable decimalNumber and initialize it to the decimal number 1234. We then call the Integer.toHexString() method and pass in the decimalNumber variable as an argument. This method returns a string representing the hexadecimal equivalent of the decimal number.
Finally, we print the hexadecimal number to the console using the System.out.println() method. The output of this program is 4d2, which is the hexadecimal equivalent of the decimal number 1234.
Java Decimal to Hex conversion: Integer.toHexString()
Yes, you can use the Integer.toHexString() method in Java to convert a decimal (base 10) number to a hexadecimal (base 16) number.
The Integer.toHexString() method takes an integer argument and returns a string representing the hexadecimal equivalent of the integer. Here’s an example:
int decimalNumber = 255; String hexadecimalNumber = Integer.toHexString(decimalNumber); System.out.println(hexadecimalNumber); // Output: ff
In this example, we declare an integer variable decimalNumber and initialize it to the decimal number 255. We then call the Integer.toHexString() method and pass in the decimalNumber variable as an argument. This method returns a string representing the hexadecimal equivalent of the decimal number.
Finally, we print the hexadecimal number to the console using the System.out.println() method. The output of this program is ff, which is the hexadecimal equivalent of the decimal number 255.
Note that the Integer.toHexString() method only works for integers. If you need to convert a floating-point number to hexadecimal, you’ll need to use a different method.
Java Decimal to Hex conversion: Custom Logic
Yes, you can also convert a decimal (base 10) number to a hexadecimal (base 16) number using custom logic in Java. Here’s an example:
int decimalNumber = 255;
String hexadecimalNumber = "";
while(decimalNumber > 0) {
int remainder = decimalNumber % 16;
if(remainder < 10) {
hexadecimalNumber = remainder + hexadecimalNumber;
} else {
char hexDigit = (char)('A' + remainder - 10);
hexadecimalNumber = hexDigit + hexadecimalNumber;
}
decimalNumber = decimalNumber / 16;
}
System.out.println(hexadecimalNumber); // Output: FF
In this example, we declare an integer variable decimalNumber and initialize it to the decimal number 255. We also declare an empty string variable hexadecimalNumber.
We then use a while loop to repeatedly divide the decimalNumber by 16 and compute the remainder. We add the remainder to the beginning of the hexadecimalNumber string using string concatenation.
If the remainder is less than 10, we simply add it as a digit to the string. Otherwise, we compute the corresponding hexadecimal digit using the formula (char)('A' + remainder - 10) and add it to the string.
After each iteration of the loop, we update the decimalNumber by dividing it by 16.
Finally, we print the hexadecimalNumber string to the console using the System.out.println() method. The output of this program is FF, which is the hexadecimal equivalent of the decimal number 255.
This method can be useful if you need to convert decimal numbers to hexadecimal in a situation where the Integer.toHexString() method is not available or not appropriate for your use case. However, keep in mind that the Integer.toHexString() method is generally more efficient and easier to use.