Everything worked perfectly when I didn't use the DocumentFilter.FilterBypass until when I added it. It still works a little but only when comma(,) or space(" ") isn't added. Which is not to the specification I was given.
Ps how can I solve this, Or if there is any algorithm or implementation that dosn't give this problem. Ps do tell me.
This is the insertString code to filter the length, and only allow space and comma
public void insertString(FilterBypass fb, int offset, String string, AttributeSet attr) throws BadLocationException {
// if (string == null || string.trim().equals("") || string.equals(","))
// {
// return;
// }
if (isNumeric(string)) {
// if (this.length > 0 && fb.getDocument().getLength() +
// string.length()
// > this.length) {
// return;
// }
if (fb.getDocument().getLength() + string.length() > this.length || string.trim().equals("") || string.equals(",")) {
this.insertString(fb, offset, string, attr);
}
// if (string == null || string.trim().equals("") ||
// string.equals(",")) {
// return;
// }
super.insertString(fb, offset, string, attr);
}
else if (string == null || string.trim().equals("") || string.equals(",")) {
super.insertString(fb, offset, string, attr);
}
}
@Override
public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet attrs) throws BadLocationException {
if (isNumeric(text)) {
if (this.length > 0 && fb.getDocument().getLength() + text.length() > this.length) {
return;
}
super.insertString(fb, offset, text, attrs);
}
}
/**
* This method tests whether given text can be represented as number. This
* method can be enhanced further for specific needs.
*
* @param text
* Input text.
* @return {@code true} if given string can be converted to number;
* otherwise returns {@code false}.
*/
private boolean isNumeric(String text) {
if (text == null || text.trim().equals("") || text.equals(",")) {
return true;
}
for (int iCount = 0; iCount < text.length(); iCount++) {
if (!Character.isDigit(text.charAt(iCount))) {
return false;
}
}
return true;
}
The other two fuctions(append from file & append from a different frame) I want to implement innocently by just appending their string values to the JTextArea that is filtered using this. But is being refused by super.insertString(.....)
