ishmayel vemuru

Ranch Hand

Posts: 46

posted 9 years ago

Hi to every one..

I have some doubt in the following examle any one help me to understand this...

class Octal

{

public static void main(String[] args)

{

int a=0254;

String oct=Integer.toOctalString(254);

String hex=Integer.toHexString(254);

System.out.println("a---------"+a); // line 1

System.out.println("oct---------"+oct); //line 2

System.out.println("hex---------"+hex); //line 3

}

}

I understood the out put produced at line 1-----172

I am unable to undertand the output produced at line 2 (out put: 376) and at line 3 (out put: fe ).

If any one have idea please hlep me to understand this...

Thanks in advance..

Ishmayel

I have some doubt in the following examle any one help me to understand this...

class Octal

{

public static void main(String[] args)

{

int a=0254;

String oct=Integer.toOctalString(254);

String hex=Integer.toHexString(254);

System.out.println("a---------"+a); // line 1

System.out.println("oct---------"+oct); //line 2

System.out.println("hex---------"+hex); //line 3

}

}

I understood the out put produced at line 1-----172

I am unable to undertand the output produced at line 2 (out put: 376) and at line 3 (out put: fe ).

If any one have idea please hlep me to understand this...

Thanks in advance..

Ishmayel

Ronald Schild

Ranch Hand

Posts: 117

posted 9 years ago

Do you know what octal and hexadecimal means?

Octal has a base of 8 instead of 10.

So 215 octal is 2x(8power2) + 1x(8power1) + 5x(8power0) = 2x64 + 1x8 + 5x1

215 normally is 2x(10power2) + 1x(10power1) + 5x(10power0) = 2x100 + 1x10 + 5x1

Hexadecimal has a base of 16. Can you figure out what 215 is hexadecimal?

Octal has a base of 8 instead of 10.

So 215 octal is 2x(8power2) + 1x(8power1) + 5x(8power0) = 2x64 + 1x8 + 5x1

215 normally is 2x(10power2) + 1x(10power1) + 5x(10power0) = 2x100 + 1x10 + 5x1

Hexadecimal has a base of 16. Can you figure out what 215 is hexadecimal?

Java hobbyist.

Pradeep Balasubramanian

Ranch Hand

Posts: 75

posted 9 years ago

The first one 0254 is an octal representation and hence it is converted to decimal

An Octal Representation is possible by prefixing a zero before the number.

We get ,

a = 172

as an octal gets converted to decimal

In the line 2

Decimal gets converted to octal

In the line 3

Decimal gets converted to hexa decimal

Explanation for line 2 :

base 10 is decimal representation

254 (base 10) = x (base 8)

Have to find x

which is 8 L 254

8 L 31 - 6

8 L 3 - 7

0 - 3

When we look after the reminder , we get 376 which is the output

Similarily for line 3,

254 (base 10) = x (base 16)

Have to find x

which is 16 L 254

16 L 15 - 14

0 - 15

Hexadecimal Representations:

Decimal | Hexadecimal

0 - 9 | 0 - 9

10 | a

11 | b

12 | c

13 | d

14 | e

15 | f

16 | 10

Hence the reminder s are 15 and 14

ie. f and e

Hence, fe.

For more informations,

http://chortle.ccsu.edu/AssemblyTutorial/Chapter-07/ass07_1.html

An Octal Representation is possible by prefixing a zero before the number.

We get ,

a = 172

as an octal gets converted to decimal

In the line 2

Decimal gets converted to octal

In the line 3

Decimal gets converted to hexa decimal

Explanation for line 2 :

base 10 is decimal representation

254 (base 10) = x (base 8)

Have to find x

which is 8 L 254

8 L 31 - 6

8 L 3 - 7

0 - 3

When we look after the reminder , we get 376 which is the output

Similarily for line 3,

254 (base 10) = x (base 16)

Have to find x

which is 16 L 254

16 L 15 - 14

0 - 15

Hexadecimal Representations:

Decimal | Hexadecimal

0 - 9 | 0 - 9

10 | a

11 | b

12 | c

13 | d

14 | e

15 | f

16 | 10

Hence the reminder s are 15 and 14

ie. f and e

Hence, fe.

For more informations,

http://chortle.ccsu.edu/AssemblyTutorial/Chapter-07/ass07_1.html

Regards,<br />Pradeep Balasubramanian<br /> <br />You have to grow from the inside out. None can teach you, none can make you spiritual. There is no other teacher but your own soul. <br /> <br />- Swami Vivekananda