alphabet array

[geebanga88]

HI i have a method that is supose to store the alphabet in an array however dont think that it is being added to the array.

 
public static void GetAlphabet (char alphabet[]) { 
       int index, ordinalVal = 97; 
       char element;  
     
       
       for (index = 1; index < alphabet.length; ++index, ++ordinalVal) {
           element = (char) ordinalVal; 
           System.out.println("Letter: " + element); 
           alphabet[index] = element;
           System.out.println("Letter: " + alphabet[index]); 
           
       }

The first print will display the letter but after attempting to add it to the array the second print wont work?

[r035198x]

HI i have a method that is supose to store the alphabet in an array however dont think that it is being added to the array.

 
public static void GetAlphabet (char alphabet[]) { 
       int index, ordinalVal = 97; 
       char element;  
     
       
       for (index = 1; index < alphabet.length; ++index, ++ordinalVal) {
           element = (char) ordinalVal; 
           System.out.println("Letter: " + element); 
           alphabet[index] = element;
           System.out.println("Letter: " + alphabet[index]); 
           
       }

The first print will display the letter but after attempting to add it to the array the second print wont work?

See also this thread.

[geebanga88]

Are u saying instead of using an 'int index' i should make it a 'char index' starting at char 'a'?

[r035198x]

Are u saying instead of using an 'int index' i should make it a 'char index' starting at char 'a'?

Just pointing out a thread where the alphabet was printed that's all.

[geebanga88]

Ok i have this:

 public static void GetAlphabet (char alphabet[]) { 
       int ordinalVal = 97; 
       char index, element;  
     
       
       for (index = 'a'; index <= 'z'; ++index, ++ordinalVal) {
           element = (char) ordinalVal; 
           System.out.println("Letter: " + element); 
           alphabet[index] = element;
           System.out.println("Letter: " + alphabet[index]); 
           
       }

But i get error:
Exception in thread "main" java.lang.Array IndexOutOfBound sException: 97
at Main.GetAlphabe t(Main.java:38)
at Main.main(Main. java:19)
Java Result: 1

[geebanga88]

AH k, i just think theres a problem with storing all the letters in the array cause i dont think they are being stored.

[r035198x]

Ok i have this:

 public static void GetAlphabet (char alphabet[]) { 
       int ordinalVal = 97; 
       char index, element;  
     
       
       for (index = 'a'; index <= 'z'; ++index, ++ordinalVal) {
           element = (char) ordinalVal; 
           System.out.println("Letter: " + element); 
           alphabet[index] = element;
           System.out.println("Letter: " + alphabet[index]); 
           
       }

But i get error:
Exception in thread "main" java.lang.Array IndexOutOfBound sException: 97
at Main.GetAlphabe t(Main.java:38)
at Main.main(Main. java:19)
Java Result: 1

[CODE=java]int counter = 0;
for (index = 'a'; index <= 'z'; index++, counter++) {
alphabet[counter] = index;
// .....[/CODE]

[JosAH]

[CODE=java]int counter = 0;
for (index = 'a'; index <= 'z'; index++, counter++) {
alphabet[counter] = index;
// .....[/CODE]

Look ma! No counter variable!

[code=java]
for (char index= 'a'; index <= 'z'; index++)
alphabet[index-'a']= index;
[/code]

Look ma! No loop!

[code=java]
char[] alphabet= "abcdefghijklmn opqrstuvwxyz".t oCharArray();
[/code]

kind regards,

Jos ;-)

[r035198x]

Look ma! No counter variable!

[code=java]
for (char index= 'a'; index <= 'z'; index++)
alphabet[index-'a']= index;
[/code]

Look ma! No loop!

[code=java]
char[] alphabet= "abcdefghijklmn opqrstuvwxyz".t oCharArray();
[/code]

kind regards,

Jos ;-)

Don't start chasing all the kids away again ...

P.S Where were you?

[JosAH]

Don't start chasing all the kids away again ...

P.S Where were you?

Sorry 'squire; I was out of my office: contract hunting ;-)

kind regards,

Jos

[geebanga88]

Ah thank for the help Josh much better without a loop:)

i just have one more problem.
I have to methods that get the data for a string and the array. But when i return to main i dont think the data put in by the methods is stored?

 
public static void main(String[] args) {
    
       String sentence = new String();
       char alphabet[] = new char [26]; 
       
       GetString(sentence);
       GetAlphabet(alphabet);
       
    }
   public static void GetString (String sentence) { 
       
       System.out.println("Please enter a string: "); 
       sentence = Keybd.in.readLine(); 
       
       return; 
       
   } 

   public static void GetAlphabet (char alphabet[]) { 
       
       alphabet= "abcdefghijklmnopqrstuvwxyz ".toCharArray(); 
       
     return;
   }

Not sure the array and string dont return the data because arent all complex data types stored by reference? If i had a a system.out.prin t to display the string and array index in mian it wont show anyrthing?

[r035198x]

Ah thank for the help Josh much better without a loop:)

i just have one more problem.
I have to methods that get the data for a string and the array. But when i return to main i dont think the data put in by the methods is stored?

 
public static void main(String[] args) {
    
       String sentence = new String();
       char alphabet[] = new char [26]; 
       
       GetString(sentence);
       GetAlphabet(alphabet);
       
    }
   public static void GetString (String sentence) { 
       
       System.out.println("Please enter a string: "); 
       sentence = Keybd.in.readLine(); 
       
       return; 
       
   } 

   public static void GetAlphabet (char alphabet[]) { 
       
       alphabet= "abcdefghijklmnopqrstuvwxyz ".toCharArray(); 
       
     return;
   }

Not sure the array and string dont return the data because arent all complex data types stored by reference? If i had a a system.out.prin t to display the string and array index in mian it wont show anyrthing?

Java passes everything by value.
You should have your methods returning values and then in your main method you should be storing those values in some values. Both methods don't need to take any parameters.

P.S I hope you didn't use Jos' method as a excuse to avoid learning loops. He posted so that you can see all the possible (and best ) methods of doing it but you should know and understand them all if you want to learn Java properly.

[geebanga88]

Can u provide an example using that code, im getting confused because if i take away the parameters netbeans tells me that it cannot find the symbol "sentence" in the methods.

[r035198x]

Can u provide an example using that code, im getting confused because if i take away the parameters netbeans tells me that it cannot find the symbol "sentence" in the methods.

Then you have to declare those variables in those methods.

[geebanga88]

sorry it cant find symbol in main but thats where i declared it?