Java Data Type How to - Use Character Data Type Wrapper Class








Question

We would like to know how to use Character Data Type Wrapper Class.

Answer

The following code shows how to create Character objects and how to use some of their methods:

public class Main {
  public static void main(String[] args) {
    // Using the constructor
    Character c1 = new Character('A');
//from   w w w  .  j a v a 2s  . co m
    // Using the factory method - preferred
    Character c2 = Character.valueOf('2');
    Character c3 = Character.valueOf('-');

    // Getting the wrapped char values
    char cc1 = c1.charValue();
    char cc2 = c2.charValue();
    char cc3 = c3.charValue();

    System.out.println("c1 = " + c1);
    System.out.println("c2 = " + c2);
    System.out.println("c3 = " + c3);

    // Using some Character class methods on c1
    System.out.println("isLowerCase c1    = " + Character.isLowerCase(cc1));
    System.out.println("isDigit c1    = " + Character.isDigit(cc1));
    System.out.println("isLetter c1    = " + Character.isLetter(cc1));
    System.out.println("Lowercase of  c1    = " + Character.toLowerCase(cc1));

    // Using some Character class methods on c2
    System.out.println("isLowerCase c2    = " + Character.isLowerCase(cc2));
    System.out.println("isDigit c2    = " + Character.isDigit(cc2));
    System.out.println("isLetter c2    = " + Character.isLetter(cc2));
    System.out.println("Lowercase of  c2    = " + Character.toLowerCase(cc2));

    System.out.println("Uppercase of  c3    = " + Character.toUpperCase(cc3));

  }
}

The code above generates the following result.