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# Caracteres Unicode Hexadecimal

Unicode hexadecimal es la representación de un punto de código Unicode —el número único que identifica a cada carácter— utilizando el sistema numérico hexadecimal (base 16) en lugar del sistema decimal. Se suele escribir en el formato `U+xxxx`, donde `U+` indica que es un punto de código Unicode y `xxxx` son los dígitos hexadecimales que representan el carácter. Por ejemplo, la letra mayúscula 'A' tiene el punto de código hexadecimal `U+0041`

{% hint style="warning" %}
Unicode: <https://en.wikipedia.org/wiki/List_of_Unicode_characters>
{% endhint %}

Alguns exemplos de codificación hexadecimal:

```java
// Na codificación hexadecimal cada cifra pode tomar 16 valores:
// Cifras hexadecimales: 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F
//F37A => OK
//32GA => KO
char c;
//Signos de puntuación y simbolos: 0020 a 002F
c = '\u0020'; // Espacio
c = '\u002F'; // Barra invertida (Slash)
//Digitos: 0030 a 0039
c = '\u0030'; // 0
c = '\u0039'; // 1
//Simbolos: 003A a 0040
c = '\u003A'; // :
c = '\u0040'; // @
//Letras Mayúsculas:0041 a 005A
c = '\u0041'; // A
c = '\u005A'; // Z
//Letras Minusculas: 0061 a 007A
c = '\u0061'; // a
c = '\u007A'; // z
```


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