Char and Character Class in Java

The Character class is a wrapper class for the char primitive data type. Many of the Character methods are overloaded and can take either a char or a Unicode character. Important Character methods are:

  • isDigit

    • Returns true if the character is a digit

  • isLetter

    • Returns true if the character is a letter

  • isLetterOrDigit

    • Returns true if the character is a letter or a digit

  • isLowerCase

    • Returns true if the character is a lower case letter

  • isSpace

    • Returns true if the character is a space

  • isUpperCase

    • Returns true if the character is an upper case letter

  • toLowerCase

    • Returns the lower case equivalent of the character

  • toUpperCase

    • Returns the upper case equivalent of the character

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