char variables behave like integers : Character Data Type « Data Type « Java Tutorial

1. Java Tutorial
2. Data Type
3. Character Data Type

public class MainClass {
  public static void main(String args[]) {
    char ch1;
   
    ch1 = 'X';
    System.out.println("ch1 contains " + ch1);
   
    ch1++; // increment ch1
    System.out.println("ch1 is now " + ch1);
  }
}

ch1 contains X
ch1 is now Y