Java - Character isAlphabetic() Method

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The Java Character isAlphabetic() method accepts a valid Unicode code point as an argument, and checks whether the corresponding code point character is an alphabet or not.

A character is said to be Alphabetic if its general category type specified in the Unicode system belongs to any of the following −

• UPPERCASE_LETTER

• LOWERCASE_LETTER

• TITLECASE_LETTER

• MODIFIER_LETTER

• OTHER_LETTER

• LETTER_NUMBER

• The Other_Alphabetic contributory property as defined by the Unicode Standard.

Syntax

Following is the syntax of the Java Character isAlphabetic() method

public static boolean isAlphabetic(int codePoint)

Parameters

• codePoint − The Unicode code point to be tested.

Return Value

The method returns a Boolean value true if the code point is an alphabetical character, false if not.

Checking a CodePoint to be an Alphabet Example

The following example shows the usage of Java Character isAlphabetic() method. We've created an int variable and assigned it a codepoint value. Now using isAlphabetic() method, we're checking if the int value represents a alphabet or not.

package com.tutorialspoint;

public class isAlphabeticDemo {
   public static void main(String args[]) {
      int cp;
      Boolean b;
      cp = 0x0043;
      b = Character.isAlphabetic(cp);
      System.out.println("Is the given code point alphabetic? " + b);
   }
}

Output

If we compile and run the program above, the output is displayed as follows −

Is the given code point alphabetic? True

Checking a CodePoint to be an Alphabet Example

The following example shows the usage of Java Character isAlphabetic() method. We've created an int variable and assigned it a codepoint value. Now using isAlphabetic() method, we're checking if the int value represents a alphabet or not.

As the given code point argument is not an alphabetic character, the method returns false.

package com.tutorialspoint;

public class isAlphabeticDemo {
   public static void main(String args[]) {
      int cp;
      Boolean b;
      cp = 0x0012;
      b = Character.isAlphabetic(cp);
      System.out.println("Is the given code point alphabetic? " + b);
   }
}

Output

If we compile and run the program above, the output is displayed as follows −

Is the given code point alphabetic? False

Checking a CodePoint to be an Alphabet Example

The following example shows the usage of Java Character isAlphabetic() method. We've created an int variable and assigned it a codepoint value. Now using isAlphabetic() method, we're checking if the int value represents a alphabet or not.

Since the return value of this method is of Boolean type, the method can be used as a condition to the conditional statements. If the return value is true, if statement is executed and if the return value is false, else is executed.

package com.tutorialspoint;

public class isAlphabeticDemo {
   public static void main(String args[]) {
      int cp;
      Boolean b;
      cp = 0x0087;
      b = Character.isAlphabetic(cp);
      if(b)
         System.out.println("The given code point is alphabetic");
      else
         System.out.println("The given code point is not alphabetic");
   }
}

Output

The output for the given program is as follows −

The given code point is not alphabetic