Hexadecimal integer literal : Hex Oct « Data Type « Java Tutorial

Put 0x or 0X in front of the numbers.
Use the letters A to F (or a to f) to represent digits with values 10 to 15, respectively.

public class MainClass {

  public static void main(String[] a) {
    int hexValue1 = 0x100;
    int hexValue2 = 0x1234;
    int hexValue3 = 0xDEAF;
    int hexValue4 = 0xCAB;

    System.out.println(hexValue1);
    System.out.println(hexValue2);
    System.out.println(hexValue3);
    System.out.println(hexValue4);
  }

}

2.9.Hex Oct
	2.9.1.	Hexadecimal integer literal
	2.9.2.	A hexadecimal literal of type long
	2.9.3.	Defining integer literals as octal values
	2.9.4.	Decode string to integer
	2.9.5.	Convert octal number to decimal number example
	2.9.6.	Convert decimal integer to octal number example
	2.9.7.	Convert decimal integer to hexadecimal number example
	2.9.8.	Parsing and Formatting a Number into Binary
	2.9.9.	Convert byte array to Hex String
	2.9.10.	Convert the bytes to a hex string representation of the bytes
	2.9.11.	Converting hexadecimal strings
	2.9.12.	Dumps data in hexadecimal format
	2.9.13.	Given a hexstring this will return the byte array corresponding to string
	2.9.14.	Hex encoder/decoder implementation borrowed from BouncyCastle
	2.9.15.	Returns the hexadecimal value of the supplied byte array
	2.9.16.	A custom number formatter that formats numbers as hexadecimal strings.
	2.9.17.	Decodes Hex data into octects
	2.9.18.	Decodes Base64 data into octects
	2.9.19.	Helper function that returns a char from an hex
	2.9.20.	Encodes hex octects into Base64
	2.9.21.	Hex encoder and decoder.
	2.9.22.	Helper function that dump an array of bytes in hex pair form, without '0x' and space chars
	2.9.23.	dump an array of bytes in hex form
	2.9.24.	Decode byte array