Returns the line at the given line index without delimiters.
Index 0 is the first line of the content. When there are not
any lines, getLine(0) is a valid call that answers an empty string.
<p>
@param lineIndex index of the line to return.
@return the line text without delimiters
@exception SWTException <ul>
<li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
<li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
</ul>
@exception IllegalArgumentException <ul>
<li>ERROR_INVALID_RANGE when the line index is outside the valid range (< 0 or >= getLineCount())</li>
</ul>
@since 3.4
Returns the line at the given line index without delimiters. Index 0 is the first line of the content. When there are not any lines, getLine(0) is a valid call that answers an empty string. <p>
@param lineIndex index of the line to return. @return the line text without delimiters
@exception SWTException <ul> <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> </ul> @exception IllegalArgumentException <ul> <li>ERROR_INVALID_RANGE when the line index is outside the valid range (< 0 or >= getLineCount())</li> </ul> @since 3.4