 |  |  |
 |  | |
 |  |  |
| | |||||||||
|
| |||||||||
|
| Question: DO WE NEED T SQUARE TO TURN IN THIS HOMEWORK |
| Question: How do we test our methods in the interactions pane after we have compiled Picture.java with no errors to see if the expected manipulation happens? |
Picture p = new Picture(FileChooser.getMediaPath("swan.jpg"));
p.show() // Now original picture is displayed
p.insertNewMethodNameHere(); // Replace with the name of your method
p.show(); // If the image didn't change, try resizing it to update it Something along those lines should work. If your method doesn't return void you may have to adjust it accordingly. Ricardo Corrales.
//declaration of the picture (if it says something like cannot load nullswan.jpg, set your media path with FileChooser.setMediaPath("yourmediapath");)
Picture p = new Picture(FileChooser.getMediaPath("swan.jpg"));
//show the original picture
p.show();
//call the method on the original picture and assign it to another variable
Picture modP = p.yourNonVoidMethod();
//show the modified picture modp
modP.show();Dawn Finney
| Question: A continuation from the question posted above, i did the void code and the picture did what i expected but when i entered the third line in the interactions pane which is the p.methodname();, I got a long error. the error read ArrayIndexOutOfBoundsException. Should i worry since the picture was still modified, and what could be causing the error? |
//declares arr as an int array of length 4 int[] arr = new int[4];Now try these lines:
arr[-1] arr[4]You should get the same error. This occurs because the indices of arr are 0 - 3 and when you try to access a index outside of that range you get an error. I would suggest looking at your loop especially the ending parameter, because many people forget that java is 0-indexed (meaning that the indices start from 0). If you are calculating your index in some way, I would look that as well. Dawn Finney