char

It's a 16-bit Unicode character. The minimum value of the char data type is $'\symbol{92}u0000'$ (0). The maximum value of the char data type is $'\symbol{92}uffff'$ . Default value is $'\symbol{92}u0000'$ .

$\begin{lstlisting} class CharExample { public static void main(String[] args) { \par char letter = '\u0051'; System.out.println(letter); } } \end{lstlisting}$

You get the output Q because the Unicode value of Q is $'\symbol{92}u0051'$ . Here is another example:

$\begin{lstlisting} class CharExample { public static void main(String[] args) {... ... \par char letter2 = 65; System.out.println(letter2); \par } } \end{lstlisting}$

When you print $\lstinline{letter1}$ , you will get 9 because $\lstinline{letter1}$ is assigned character '9'. When you print $\lstinline{letter2}$ , you get A because the ASCII value of 'A' is 65. It's because java compiler treats the character as an integral type.