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Thread: Need help with understanding arrays

  1. #1
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    Default Need help with understanding arrays

    If I had a string array such as array[1]="abcd". Is it possible to interate through the elements of that, so for example if I wanted to shift the positions to make it dabc. So far I only have come across problems where an array, for examples args who has 3 elements args[0]=1, args[1]=2 and args[2]=3 and I would use a FOR loop to do that:


    int b=3;
    String[] args= new char[b];
     
    for(int i=0; i < args.length; i++)
    {
       //do something
    }

    Pretty much what I'm wondering is, can you iterate through a string in one element of an array using a loop?


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    Default Re: Need help with understanding arrays

    See the API for the String class. Lots of methods that you might find useful (for instance the toCharArray method).
    String (Java Platform SE 7 )

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    Default Re: Need help with understanding arrays

    Hi I tried to just make a sample code for me to understand how to change the elements to containing a different letter but it didn't quite work out. I am trying to shift 1 position down, so b to the first element, c to second element and etc. I was thinking of using a nested for loop but then I got even more confused.

     String test="abcd";
     char[] array = test.toCharArray();
     
                     for(int i=1; i < array.length; i++)
    		 {
    			 array[i]=array[i-1];
    		 }
     
    		         System.out.print(array[0]);
    		         System.out.print(array[1]);
    		         System.out.print(array[2]);
    		         System.out.print(array[3]);


    --- Update ---

    Ah nevermind. I think I have got the hang of it.

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