In this post, we discuss the character class in java.
Example:
char ch = 'x';
// Unicode for uppercase Greek omega character
char uniChar = '\u039A';
// an array of chars
char[] charArray ={ 'x', 'y', 'z' };
Java provides wrapper class Character for primitive data type char. You can create a Character object with the Character constructor:
Character ch = new Character('x');
Escape Sequences
A character preceded by a backslash (\) is an escape sequence and has a special meaning to the compiler. The newline character (\n) has been used frequently in this tutorial in System.out.println() statements to advance to the next line after the string is printed.
| Escape Sequence | Description |
|---|---|
| \t | Use to Inserts a tab in the text at this point. |
| \n | Use to Inserts a newline in the text at this point. |
| \f | Use to Inserts a form feed in the text at this point. |
| \r | Use to Inserts a carriage return in the text at this point. |
| \” | Use to Inserts a double quote character in the text at this point. |
| \’ | Use to Inserts a single quote character in the text at this point. |
| \\ | Use to Inserts a backslash character in the text at this point. |
Example
use the escape sequence, \”, on the interior quotes:
public class Test {
public static void main(String args[]) {
System.out.println("Hello \"World\" !");
}
}
Output
Hello "World" !
Character Methods
Following is the list of the important instance methods that all the subclasses of the Character class implement −
| Method | Description |
|---|---|
| isLetter() | This method Determines whether the specified char(ch) value is a letter.. |
| isDigit() | This method Determines whether the specified char(ch) value is a digit. |
| isWhitespace() | This method Determines whether the specified char value is white space. |
| isUpperCase() | This method Determines whether the specified char(ch) value is uppercase. |
| isLowerCase() | This method Determines whether the specified char(ch) value is lowercase. |
| toString() | Returns a String object representing the specified character value that is, a one-character string. |
Following is the list of the important instance methods that all the subclasses of the Character class implement −