1- import java .lang .StringBuilder ;
2- import java .util .Scanner ;
31
4- class Test {
5- private static final int sizeOfIntInHalfBytes =8 ;
6- private static final int numberOfBitsInAHalfByte =4 ;
7- private static final int halfByte =0x0F ;
8- private static final char []hexDigits = {
9- '0' ,'1' ,'2' ,'3' ,'4' ,'5' ,'6' ,'7' ,
10- '8' ,'9' ,'A' ,'B' ,'C' ,'D' ,'E' ,'F'
11- };
2+ class DecimalToHexaDecimal {
3+ private static final int sizeOfIntInHalfBytes =8 ;
4+ private static final int numberOfBitsInAHalfByte =4 ;
5+ private static final int halfByte =0x0F ;
6+ private static final char []hexDigits = {'0' ,'1' ,'2' ,'3' ,'4' ,'5' ,'6' ,'7' ,'8' ,'9' ,'A' ,'B' ,'C' ,'D' ,'E' ,
7+ 'F' };
128
13- public static String decToHex ( int dec ) {
14- StringBuilder hexBuilder = new StringBuilder ( sizeOfIntInHalfBytes );
15- hexBuilder . setLength (sizeOfIntInHalfBytes );
16- for ( int i = sizeOfIntInHalfBytes - 1 ; i >= 0 ; -- i )
17-
18- int j =dec &halfByte ;
19- hexBuilder .setCharAt (i ,hexDigits [j ]);
20- dec >>=numberOfBitsInAHalfByte ;
21-
22- return hexBuilder .toString ();
23-
9+ // Returns the hex value of the dec entered in the parameter.
10+ public static String decToHex ( int dec ) {
11+ StringBuilder hexBuilder = new StringBuilder (sizeOfIntInHalfBytes );
12+ hexBuilder . setLength ( sizeOfIntInHalfBytes );
13+ for ( int i = sizeOfIntInHalfBytes - 1 ; i >= 0 ; -- i ) {
14+ int j =dec &halfByte ;
15+ hexBuilder .setCharAt (i ,hexDigits [j ]);
16+ dec >>=numberOfBitsInAHalfByte ;
17+
18+ return hexBuilder .toString (). toLowerCase ();
19+
2420
25- public static void main (String []args ) {
26- Scanner sc =new Scanner (System .in );
27- System .out .println ("Write your Number to convert into HexaDecimal: " )
28- int dec =305445566 ;
29- String hex =Integer .toHexString (dec );
30- String hex =decToHex (dec );
31- System .out .println (hex );
32- }
21+ // Test above function.
22+ public static void main (String []args ) {
23+ System .out .println ("Test..." );
24+ int dec =305445566 ;
25+ String libraryDecToHex =Integer .toHexString (dec );
26+ String decToHex =decToHex (dec );
27+ System .out .println ("Result from the library : " +libraryDecToHex );
28+ System .out .println ("Result decToHex method : " +decToHex );
29+ }
3330}