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Java Character isUnicodeIdentifierPart(char ch) Method

Java isUnicodeIdentifierPart(char ch) is a part of Character class. This method is used to check whether the specified character may be part of a Unicode identifier as other than the first character.

This method does not support supplementary characters. A character may be part of a Unicode identifier if and only if one of the following statements is true:

  • it is a letter
  • it is a connecting punctuation character (such as '_')
  • it is a digit
  • it is a numeric letter (such as a Roman numeral character)
  • it is a combining mark
  • it is a non-spacing mark

Syntax:

public static boolean isUnicodeIdentifierPart(char ch)

Parameters:

The parameter passed is the character to be checked whether it is a part of the Unicode identifier as other than the first character.

Returns:

Returns the boolean value true if the specified character is a part of Unicode identifier else return false.

Example 1:

Here, the characters are checked whether they are part of Unicode identifiers or not.

public class StudyTonight
{  
	public static void main(String[] args)
	{  
		char ch1 = '~';  
		char ch2 = 'd';  
		char ch3 = '\u01f2';  
		char ch4  = '0';   
		char ch5  = '7';  

		boolean b1 = Character.isUnicodeIdentifierPart(ch1);  
		boolean b2 = Character.isUnicodeIdentifierPart(ch2);  
		boolean b3 = Character.isUnicodeIdentifierPart(ch3);  
		boolean b4 = Character.isUnicodeIdentifierPart(ch4);  
		boolean b5 = Character.isUnicodeIdentifierPart(ch5);  

		System.out.println(ch1 +" is a part of Unicode identifier??:  "+b1);  
		System.out.println(ch2 +" is a part of Unicode identifier??:  "+b2);  
		System.out.println(ch3 +" is a part of Unicode identifier??:  "+b3);  
		System.out.println(ch4 +" is a part of Unicode identifier?? : "+b4);  
		System.out.println(ch5 +" is a part of Unicode identifier??:  "+b5);  
	}  
} 


~ is a part of Unicode identifier??: false
d is a part of Unicode identifier??: true
? is a part of Unicode identifier??: true
0 is a part of Unicode identifier?? : true
7 is a part of Unicode identifier??: true

Example 2:

Here is a user-defined example where anyone using this code can put a value of his choice and get the equivalent output.

import java.util.Scanner; 
public class StudyTonight
{  
	public static void main(String[] args)
	{  
		try
		{
			System.out.print("Enter the character: ");  
			Scanner sc = new Scanner(System.in);         
			char ch = sc.next().charAt(0);  
			boolean b = Character.isUnicodeIdentifierPart(ch);
			System.out.println(ch + " is a part of Unicode identifier??: "+b);
		}
		catch(Exception e)
		{
			System.out.println("Invalid Input!!");
		}
	}  
}


Enter the character: @
@ is a part of Unicode identifier??: false
***********************************************
Enter the character: e
e is a part of Unicode identifier??: true

Live Example:

Here, you can test the live code example. You can execute the example for different values, even can edit and write your examples to test the Java code.