java.lang.Character.isIdentifierIgnorable(char ch) java.lang.Character.isHighSurrogate(char ch) java.lang.Character.isIdentifierIgnorable(int codePoint) java.lang.Character.isIdentifierIgnorable(char ch) package com.codingdict; import java.lang.*; public class CharacterDemo { public static void main(String[] args) { // create 2 character primitives ch1, ch2 char ch1, ch2; // assign values to ch1, ch2 ch1 = '\u0000'; ch2 = '8'; // create 2 boolean primitives b1, b2 boolean b1, b2; // assign isIdentifierIgnorable results of ch1, ch2 to b1, b2 b1 = Character.isIdentifierIgnorable(ch1); b2 = Character.isIdentifierIgnorable(ch2); String str1 = "ch1 is an ignorable control character is " + b1; String str2 = "ch2 is an ignorable control character is " + b2; // print b1, b2 values System.out.println( str1 ); System.out.println( str2 ); } } java.lang.Character.isHighSurrogate(char ch) java.lang.Character.isIdentifierIgnorable(int codePoint)