java.lang.Character isJavaIdentifierPart(char ch)
Description
A character may be part of a Java identifier if any of the following are true:
- it is a letter
- it is a currency symbol (such as ‘$’)
- 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
- isIdentifierIgnorable returns true for the character
This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the isJavaIdentifierPart(int) method.
The isJavaIdentifierPart(char ch) method of Character class is static thus it should be accessed statically which means the we would be calling this method in this format:
Character.isJavaIdentifierPart(char ch)
Non static method is usually called by just declaring method_name(argument) however in this case since the method is static, it should be called by appending the class name as suffix. We will be encountering a compilation problem if we call the java isJavaIdentifierPart() method non statically.
Method Syntax
public static boolean isJavaIdentifierPart(char ch)
Method Argument
| Data Type | Parameter | Description |
|---|---|---|
| char | ch | the character to be tested. |
Method Returns
The isJavaIdentifierPart(char ch) method of Character class returns true if the character may be part of a Java identifier; false otherwise.
Compatibility
Requires Java 1.1 and up
Java Character isJavaIdentifierPart(char ch) Example
Below is a simple java example on the usage of isJavaIdentifierPart(char ch) method of Character class.
package com.javatutorialhq.java.examples;
import java.util.Scanner;
/*
* This example source code demonstrates the use of
* isJavaIdentifierPart(char ch) method of Character class.
*/
public class CharacterIsJavaIdentifierPartCharExample {
public static void main(String[] args) {
// Ask for user input
System.out.print("Enter a character:");
// use scanner to get the user input
Scanner s = new Scanner(System.in);
// get a single character
char value = s.nextLine().toCharArray()[0];
// close the scanner object
s.close();
/*
* check if the specified character may be part of a
* Java identifier as other than the first character.
*/
boolean checkBool = Character.isJavaIdentifierPart(value);
// print result
if (checkBool) {
System.out.print("User input '" + value + "' is permissible as "
+ "part of Java identifier");
} else {
System.out.print("User input '" + value + "' is not permissible as "
+ "part of Java identifier");
}
}
}
Sample Output
Below is the sample output when you run the above example.
