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);
}
}
256
4660
57007
3243