Thread: Problem with an array in a timer

It seems like the issue with your timer lies in the loop where you're attempting to parse the text from the text fields into integers. Here are a few things to consider:

1. Array Bounds: Your loop condition `t < 51` suggests you're iterating over 51 elements, but your array only has 50 elements (indices 0 to 49). This may lead to an `ArrayIndexOutOfBoundsException` when accessing `textFields[50]`. You should adjust the loop condition to `t < textFields.length`.

2. Null Check: Although you're checking if `textFields[t]` is not null before parsing, it seems like your array `textFields` may contain null elements. Ensure that all elements in the `textFields` array are initialized before using them in the loop.

3. Substring Error: When catching an exception in the `catch` block, you're attempting to trim the text field content by one character using `substring(0, textFields[t].getText().length() - 1)`. This might not be the best approach because it's just removing the last character without checking whether it's non-integer or not. Consider implementing a more robust method to filter out non-integer characters.

Here's the modified version of your timer code considering these points:

```java
final Timer t3 = new Timer(5000, new ActionListener() {
public void actionPerformed(ActionEvent e) {
for (int t = 0; t < textFields.length; t++) {
if (textFields[t] != null) {
try {
// Attempt to parse integer
int x = Integer.parseInt(textFields[t].getText());
} catch (NumberFormatException ex) {
// Non-integer detected, handle accordingly
String originalText = textFields[t].getText();
// Remove non-integer characters
String filteredText = originalText.replaceAll("[^0-9]", "");
// Set the text field with filtered content
textFields[t].setText(filteredText);
}
}
}
}
});
t3.start();
```

This code iterates over all elements in the `textFields` array, checks for nullity, attempts to parse integer, and handles the case where a non-integer is detected by removing non-integer characters from the text field. Make sure to replace `[0-9]` with your desired range of valid characters if needed.

In addressing the non-integer character filtering issue, consider seeking additional resources or help with Java assignment. Exploring various programming forums or assignment help platforms like ProgrammingHomeworkHelp.com, where experts provide guidance on Java programming tasks could be beneficial. Additionally, consulting with online communities specializing in programming homework help might offer valuable insights into resolving such challenges effectively.