Java.lang.Character.isJavaIdentifierPart() Method

Description

The java.lang.Character.isJavaIdentifierPart(char ch) determines if the specified character may be part of a Java identifier as other than the first character.

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

Declaration

Following is the declaration for java.lang.Character.isJavaIdentifierPart() method

public static boolean isJavaIdentifierPart(char ch)

Parameters

• ch - the character to be tested

Return Value

This method returns true if the character may be part of a Java identifier, false otherwise.

Exception

• NA

Example

The following example shows the usage of lang.Character.isJavaIdentifierPart() method.

package com.tutorialspoint;

import java.lang.*;

public class CharacterDemo {

   public static void main(String[] args) {

      // create 2 char primitives ch1, ch2
      char ch1, ch2;

      // assign values to ch1, ch2
      ch1 = '3';
      ch2 = '/';

      // create 2 boolean primitives b1, b2
      boolean b1, b2;

      /**
       *  check if ch1, ch2 can be part of java identifier
       *  and assign results to b1, b2
       */
      b1 = Character.isJavaIdentifierPart(ch1);
      b2 = Character.isJavaIdentifierPart(ch2);

      String str1 = ch1 + " may be part of a Java identifier is " + b1;
      String str2 = ch2 + " may be part of a Java identifier is " + b2;

      // print b1, b2 values
      System.out.println( str1 );
      System.out.println( str2 );
   }
}

Let us compile and run the above program, this will produce the following result:

3 may be part of a Java identifier is true
/ may be part of a Java identifier is false