On Nov 26, 4:41 pm, MorneDV <[email protected]> wrote:
> Can someone help please?
>
> I just started the J2SE online training cource.
> I have a problem with the homework part in the control structure
> section.The homework is to modify the MyForLoopProject project and use
> the while loop.
> The code works correctly if you type a valid name listed in the array.
> When you type an name not listed in the array I get an error...instead
> of displaying ("noname" is not found)
> Error:
> Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException:
> 8
> at MyOwnWhile.main(MyOwnWhile.java:26)
> Java Result: 1
> BUILD SUCCESSFUL (total time: 6 seconds)
>
> Code:
> import javax.swing.JOptionPane;
>
> public class MyOwnWhile {
>
> /** Creates a new instance of MyOwnWhile */
> public MyOwnWhile() {
> }
>
> /**
> * @param args the command line arguments
> */
> public static void main(String[] args) {
> // Declare and initialize String array variable called names.
> String names []=
> {"Beah","Bianca","Lance","Belle","Nico","Yza","Gem","Ethan"};
>
> // This is the search string we are going to use to search the
> array.
> String searchName = JOptionPane.showInputDialog("Enter either
> \"Yza\" or \"noname\"!");
>
> // Declare and initialize boolean primitive type variable
> calld foundName.
> boolean foundName =false;
>
> int i=0;
> while (i<names.length){
> i++;
I think, the issue lies with above increment. In the comparison below,
it compares the next index against searchName. Then, in the final
iteration, it tries to access the last index + 1, causing an
ArrayOutOfBoundsException.
I suggest the increment be moved to the end of the while loop. Like:
while (i<names.length){
if (names [i ].equals(searchName)){
foundName =true;
break;
}
i++; // Moved.
}
>
> if (names [i ].equals(searchName)){
> foundName =true;
> break;
> }
> }
>
> // Display the result
> if (foundName)
> JOptionPane.showMessageDialog(null, searchName + " is
> found!");
>
> else
> JOptionPane.showMessageDialog(null, searchName + " is not
> found!");
>
> }
>
>
>
> }
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