java.lang.Character.codePointBefore(char[ ] a, int index) java.lang.Character.compareTo(Character anotherCharacter) java.lang.Character.digit(char ch, int radix) java.lang.Character.codePointBefore(char[ ] a, int index) package com.codingdict; import java.lang.*; public class CharacterDemo { public static void main(String[] args) { // create a char array c and assign values char[] c = new char[] { 'a', 'b', 'c', 'd', 'e' }; // create and assign value to index int index = 2; // create an int res int res; // assign result of codePointBefore on array c at index to res res = Character.codePointBefore(c, index); String str = "Unicode code point is " + res; // print res value System.out.println( str ); } } java.lang.Character.compareTo(Character anotherCharacter) java.lang.Character.digit(char ch, int radix)