Operations that involve values of type char

• Conversion from char to int, which corresponds to calculating the Unicode code of a character:

  char c = 'A';
  int i = c;             // i contains the Unicode code of the character 'A'
  System.out.println(i); // prints 65
  

• Conversion from int to char, which corresponds to obtain a character from its Unicode code:

  int i = 65;            // Unicode code of the character 'A'
  char c = (char) i;
  System.out.println(c); // prints 'A'
  

• Conversion from char to String:

  char c = 'A';
  String s = String.valueOf(c);
  String s1 = Character.toString(c);  // is equivalent to the previous statement
  

• Extraction of a char from an object of type String:

  String s = "hello";
  char c = s.charAt(0); // extracts the character in position 0 from "hello",
                        // i.e., 'h', and assigns it to the variable c
  

• Reading a char:

  String s = JOptionPane.showInputDialog("Insert a character");
  char c = s.charAt(0);
  

• Writing a char:

  char c = 'a';
  System.out.println(c);