convert decimal to hexadecimal in java

1Integer.toHexString()

1public class DecimalToHexExample2{    
2public static String toHex(int decimal){    
3     int rem;  
4     String hex="";   
5     char hexchars[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};  
6    while(decimal>0)  
7     {  
8       rem=decimal%16;   
9       hex=hexchars[rem]+hex;   
10       decimal=decimal/16;  
11     }  
12    return hex;  
13}    
14public static void main(String args[]){      
15     System.out.println("Hexadecimal of 10 is: "+toHex(10));  
16     System.out.println("Hexadecimal of 15 is: "+toHex(15));  
17     System.out.println("Hexadecimal of 289 is: "+toHex(289));  
18}} 

1int integer = 18;
2
3String hexString = Integer.toHexString(integer);

1import java.util.Scanner;
2public class DecimalToHexaExample 
3{
4   public static void main(String[] args) 
5   {
6      Scanner sc = new Scanner(System.in);
7      System.out.println("Please enter decimal number: ");
8      int decimal = sc.nextInt();
9      String strHexadecimal = "";
10      while(decimal != 0)
11      {
12         int hexNumber = decimal % 16;
13         char charHex;
14         if(hexNumber <= 9 && hexNumber >= 0)
15         {
16            charHex = (char)(hexNumber + '0');
17         }
18         else
19         {
20            charHex = (char)(hexNumber - 10 + 'A');
21         }
22         strHexadecimal = charHex + strHexadecimal;
23         decimal = decimal / 16;
24      }
25      System.out.println("Hexadecimal number: " + strHexadecimal);
26      sc.close();
27   }
28}