Java Character Class - Java

What is Java Character Class?

Normally, when we work with characters, we use primitive data types char.

Example

Though in development, we come across situations where we want to use objects in its place of primitive data types. In order to attain this, Java offers wrapper class Character for primitive data type char.

The Character class offers a number of useful class (i.e., static) methods for manipulating characters. You can create a Character object with the Character constructor −

The Java compiler will also create a Character object for you under some circumstances. For instance, if you pass a primitive char into a method that imagines an object, the compiler mechanically converts the char to a Character for you. This feature is called autoboxing or unboxing, if the conversion goes the other way.

Example

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.

Following table shows the Java escape sequences −

Escape Sequence

Description

\t

Inserts a tab in the text at this point.

\b

Inserts a backspace in the text at this point.

\n

Inserts a newline in the text at this point.

\r

Inserts a carriage return in the text at this point.

\f

Inserts a form feed in the text at this point.

\'

Inserts a single quote character in the text at this point.

\"

Inserts a double quote character in the text at this point.

\\

Inserts a backslash character in the text at this point.

When an escape sequence is encountered in a print statement, the compiler interprets it accordingly.

Example

If you want to put quotes within quotes, you must use the escape sequence, \", on the interior quotes −

This will produce the following result −

Output

Character Methods


Following is the list of the important instance methods that all the subclasses of the Character class implement –

Sr.No.

Method & Description

1

isLetter()

Determines whether the specified char value is a letter.

2

isDigit()

Determines whether the specified char value is a digit.

3

isWhitespace()

Determines whether the specified char value is white space.

4

isUpperCase()

Determines whether the specified char value is uppercase.

5

isLowerCase()

Determines whether the specified char value is lowercase.

6

toUpperCase()

Returns the uppercase form of the specified char value.

7

toLowerCase()

Returns the lowercase form of the specified char value.

8

toString()

Returns a String object representing the specified character value that is, a one-character string.


For a whole list of methods, please refer to the java.lang.Character API specification.

What is Following?

In the next section, we will be going through the String class in Java. You will be learning how to declare and use Strings efficiently as well as some of the important methods in the String class.

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