radix conversion

[Brian Podolny]

I'm trying to write a sample program that converts Decimal numbers to binary, Octal, and Hex, and vice versa and displays the results. Is there a simple way to force the output of a number to be displayed as binary, octal or Hexadecimal rather than defaulting to Decimal when used with println()?
Thanks

[Marilyn de Queiroz]

1. println( "\ddd" ) = Octal
   
2. println( "\xdd" ) = Hexadecimal
   
3. println( "\udddd" ) = Unicode character
   

Marilyn

[Carl Trusiak]

If your just doing int's it's fairly easy....
int i = 234;
System.out.println(Integer.toBinaryString(i));
System.out.println(Integer.toHexString(i));
System.out.println(Integer.toOctalString(i));
Hope this is helpful.

[Brian Podolny]

Thanks Carl, that's close to what I was looking for. I've already written the program I was working on and it works fine but it seems inneficient to me. I was hoping there were methods written into the language that would display numbers in Hex, bin, and octal, rather than accepting them in those forms but not displaying them. The Integer methods help but they don't cover what I'm doing. I wrote a method that accepts a String representing a number, the radix of that number, the radix it's being converted to and then outputs a String representing the number with the new base. I wanted to be able to output as an int or long rather than a String, but this doesn't seem possible, particuarly for Hex numbers.
[This message has been edited by Brian Podolny (edited September 11, 2000).]

[Carl Trusiak]

Well, if you get right down to what you are seeing on the screen of your computer, it's all Strings with each character a visual representation of a numeric value (ascii on most pc's) So, writing the representation as a string isn't relivant. To convert a binary, hex or octal String to an integer value you can use
Integer.valueOf(String s, int radix)which does exactly what you are trying. The use of this and the methods earlier, should make your routine fairly easy to code.
Good Luck