I have a grid in my GWT application
there are columns and rows which have data , if the data size for every row/column is same ,it works fine , but if some data gets larger , the whole format of my grid disturbs .
attached is the screenshot of my GRID , is there any solution for this ,like can i create a tooltip for larger texts or any other way .

You could define text overflow to ellipsis, so the text in your column will clip.
The text-overflow declaration allows you to deal with clipped text: that is, text that does not fit into its box. The ellipsis value causes three periods to be appended to the text.