character.isAlphanumeric Java

The character.isAlphanumeric method in Java is used to check whether a given character is alphanumeric or not. An alphanumeric character is either a letter or a digit.

Syntax

public static boolean isAlphanumeric(char ch)

The method takes a single character as input and returns a boolean value indicating whether the character is alphanumeric or not.

Example

Here is an example usage of the isAlphanumeric method:

char ch1 = 'a';
char ch2 = '7';
char ch3 = '$';

boolean isCh1Alphanumeric = Character.isAlphanumeric(ch1); // true
boolean isCh2Alphanumeric = Character.isAlphanumeric(ch2); // true
boolean isCh3Alphanumeric = Character.isAlphanumeric(ch3); // false

In the above example, we have three characters ch1, ch2, and ch3. ch1 is a lowercase letter 'a', ch2 is a digit '7', and ch3 is a special character '$'. We use the isAlphanumeric method to check if each character is alphanumeric or not, and store the result in respective boolean variables.

Return Value

The isAlphanumeric method returns true if the character is alphanumeric, and false otherwise.

Constraints

• The method only takes a single character as input, any other argument will result in a compilation error.
• The method considers a character as alphanumeric if it falls within the ranges of '0' to '9', 'A' to 'Z', and 'a' to 'z'. All other characters are considered non-alphanumeric.

Markdown Code snippet

The `isAlphanumeric` method in Java is used to check whether a given character is alphanumeric or not. An alphanumeric character is either a letter or a digit.

## Syntax

```java
public static boolean isAlphanumeric(char ch)

The method takes a single character as input and returns a boolean value indicating whether the character is alphanumeric or not.

Example

Here is an example usage of the isAlphanumeric method:

char ch1 = 'a';
char ch2 = '7';
char ch3 = '$';

boolean isCh1Alphanumeric = Character.isAlphanumeric(ch1); // true
boolean isCh2Alphanumeric = Character.isAlphanumeric(ch2); // true
boolean isCh3Alphanumeric = Character.isAlphanumeric(ch3); // false

In the above example, we have three characters ch1, ch2, and ch3. ch1 is a lowercase letter 'a', ch2 is a digit '7', and ch3 is a special character '$'. We use the isAlphanumeric method to check if each character is alphanumeric or not, and store the result in respective boolean variables.

Return Value

The isAlphanumeric method returns true if the character is alphanumeric, and false otherwise.