IsDigit / digit in Character class - ouput ?

Can somebody help me in knowing why such an output is coming while I use forDigit / digit from Character class?
The output that I get is:
The for Digit is
The digit is -1
Note : There is a blank space after the is there.
class chard
     public static void main(String[] args)
          int a = 66;
          char ch1 = 66;
          System.out.println("The for Digit is" + Character.forDigit(a, 2));
          System.out.println("The digit is " + Character.digit(ch1, 2));
}

Why aren't you reading the documentation????
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Character.html
digit(char ch, int radix)
"Returns the numeric value of the character ch in the specified radix.
If the radix is not in the range MIN_RADIX <= radix <= MAX_RADIX or if the value of ch is not a valid digit in the specified radix, -1 is returned. A character is a valid digit if at least one of the following is true: "
How do you expect value 66 which is the same as 'B' to be a valid value in base 2?
/Kaj

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Bebo wrote:
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the implement into a program without using character class
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sabre150 wrote:
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paulwooten wrote:
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Hi all
I am kinda new to Java!
I have an anemic class (defines no behaviour) that has a field of primitive type char. I know that fields are always initialized even if don´t do it, so I created this class to find out what character java assigns to a character field.
I didn´t find it out yet!
The code is working and as a shortcut i prefer to run it in the command prompt by typing:
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/******************************************************************BEGGINING OF THE CLASS**********************************************************************/
public class CharacterTest {
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          System.out.println("Just to make sure the field character from class AnemicClass is not a whitespace let´s check the whitespace character
codepoint: " +
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This is an anemic (defines no behaviour) class. It is only a repository for data.
class AnemicClass {
     public static char caractere; //primitive type char
/*************************************************************************END OF THE CLASS******************************************************************/
AND THIS IS THE PROGRAM OUTPUT
AnemicClass.caractere
Is AnemicClass.caractere field a whitespace using primitive type char comparison? false
Is AnemicClass.caractere field a whitespace using String object comparison? false
How many characters are there in the String object that encapsulates the character? 1
What codepoint represents such character? 0
Is this character defined in Unicode? true
Is this character (Unicode code point) an ISO control character? true
Is this character (Unicode code point) a white space according to Java? false
Is this character (Unicode code point) a letter or a digit? false
Just to make sure the field character from class AnemicClass is not a whitespace let┤s check the whitespace character codepoint 32
Edited by: charllescuba1008 on Mar 20, 2009 11:20 AM
Edited by: charllescuba1008 on Mar 20, 2009 11:21 AM

Hi all
I am kinda new to Java!
I have an anemic class (defines no behaviour) that has a field of primitive type char. I know that fields are always initialized even if don´t do it, so I created this class to find out what character java assigns to a character field.
I didn´t find it out yet!
The code is working and as a shortcut i prefer to run it in the command prompt by typing:
javac CharacterTest.java
java CharacterTest (Here you have to omit the extension)
/******************************************************************BEGGINING OF THE CLASS**********************************************************************/
public class CharacterTest {
public static void main(String args[]) {
System.out.println("AnemicClass.caractere " + Test.caractere);
boolean isWhiteSpace = (AnemicClass.caractere == ' ')? true: false;
System.out.println("Is AnemicClass.caractere field a whitespace using primitive type char comparison? " + isWhiteSpace);
String character = String.valueOf(AnemicClass.caractere);
isWhiteSpace = (" ".equals(character))? true: false;
System.out.println("Is AnemicClass.caractere field a whitespace using String object comparison? " + isWhiteSpace);
//Just to be sure if the string has any character in its state
System.out.println("How many characters are there in the String object that encapsulates the character? " + character.length());
//print the codepoint of our Unicode character
System.out.println("What codepoint represents such character? " + character.codePointAt(0));
//Is this character defined in Unicode?
System.out.println("Is this character defined in Unicode? " + Character.isDefined(Test.caractere));
//Is this character (Unicode code point) an ISO control character?
System.out.println("Is this character (Unicode code point) an ISO control character? " + Character.isISOControl(Test.caractere));
//Is this character (Unicode code point) a white space according to Java?
System.out.println("Is this character (Unicode code point) a white space according to Java? " + Character.isWhitespace(Test.caractere));
//Is this character (Unicode code point) a letter or a digit?
System.out.println("Is this character (Unicode code point) a letter or a digit? " + Character.isLetterOrDigit(Test.caractere));
System.out.println("Just to make sure the field character from class AnemicClass is not a whitespace let´s check the whitespace character
codepoint: " +
" ".codePointAt(0));
This is an anemic (defines no behaviour) class. It is only a repository for data.
class AnemicClass {
public static char caractere; //primitive type char
}/*************************************************************************END OF THE CLASS******************************************************************/
AND THIS IS THE PROGRAM OUTPUT
AnemicClass.caractere
Is AnemicClass.caractere field a whitespace using primitive type char comparison? false
Is AnemicClass.caractere field a whitespace using String object comparison? false
How many characters are there in the String object that encapsulates the character? 1
What codepoint represents such character? 0
Is this character defined in Unicode? true
Is this character (Unicode code point) an ISO control character? true
Is this character (Unicode code point) a white space according to Java? false
Is this character (Unicode code point) a letter or a digit? false
Just to make sure the field character from class AnemicClass is not a whitespace let┤s check the whitespace character codepoint 32

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